Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust valves, tested at 40,000 psi and 1400?F, impressively endured up to 100,000,000 (one hundred million) cycles. In contrast, competitors' offerings failed after just 100,000 cycles, showcasing a staggering 1000 times better fatigue life.Designed for High Temperature Gasoline Engines: Engineered for superior performance in high-temperature gasoline engines.Chrome Stems and Hard Tips: Incorporating chrome stems and hard tips for enhanced durability and longevity.Optimized Combustion: Swirl polished under head areas and fully machined combustion faces for improved airflow and combustion efficiency.XH-428 for Exhaust: No competitor worldwide offers the exceptional XH-428 as exhaust valve material. It boasts nearly double the ultimate tensile strength at 1500?F compared to the competition's EV-8.NK-844 for Intake: Our intake valve material, NK-844, is equally unmatched, displaying over four times the ultimate tensile strength of the competition's best intake valve material at 1000?F.

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust valves, tested at 40,000 psi and 1400?F, impressively endured up to 100,000,000 (one hundred million) cycles. In contrast, competitors' offerings failed after just 100,000 cycles, showcasing a staggering 1000 times better fatigue life.Designed for High Temperature Gasoline Engines: Engineered for superior performance in high-temperature gasoline engines.Chrome Stems and Hard Tips: Incorporating chrome stems and hard tips for enhanced durability and longevity.Optimized Combustion: Swirl polished under head areas and fully machined combustion faces for improved airflow and combustion efficiency.XH-428 for Exhaust: No competitor worldwide offers the exceptional XH-428 as exhaust valve material. It boasts nearly double the ultimate tensile strength at 1500?F compared to the competition's EV-8.NK-844 for Intake: Our intake valve material, NK-844, is equally unmatched, displaying over four times the ultimate tensile strength of the competition's best intake valve material at 1000?F.

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust valves, tested at 40,000 psi and 1400?F, impressively endured up to 100,000,000 (one hundred million) cycles. In contrast, competitors' offerings failed after just 100,000 cycles, showcasing a staggering 1000 times better fatigue life.Designed for High Temperature Gasoline Engines: Engineered for superior performance in high-temperature gasoline engines.Chrome Stems and Hard Tips: Incorporating chrome stems and hard tips for enhanced durability and longevity.Optimized Combustion: Swirl polished under head areas and fully machined combustion faces for improved airflow and combustion efficiency.XH-428 for Exhaust: No competitor worldwide offers the exceptional XH-428 as exhaust valve material. It boasts nearly double the ultimate tensile strength at 1500?F compared to the competition's EV-8.NK-844 for Intake: Our intake valve material, NK-844, is equally unmatched, displaying over four times the ultimate tensile strength of the competition's best intake valve material at 1000?F.

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust valves, tested at 40,000 psi and 1400?F, impressively endured up to 100,000,000 (one hundred million) cycles. In contrast, competitors' offerings failed after just 100,000 cycles, showcasing a staggering 1000 times better fatigue life.Designed for High Temperature Gasoline Engines: Engineered for superior performance in high-temperature gasoline engines.Chrome Stems and Hard Tips: Incorporating chrome stems and hard tips for enhanced durability and longevity.Optimized Combustion: Swirl polished under head areas and fully machined combustion faces for improved airflow and combustion efficiency.XH-428 for Exhaust: No competitor worldwide offers the exceptional XH-428 as exhaust valve material. It boasts nearly double the ultimate tensile strength at 1500?F compared to the competition's EV-8.NK-844 for Intake: Our intake valve material, NK-844, is equally unmatched, displaying over four times the ultimate tensile strength of the competition's best intake valve material at 1000?F.

Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity and wear resistance.Swirl Polished and Fully Machined: The valves feature swirl polished under head areas and fully machined combustion faces to optimize airflow and combustion efficiency.Variety of Shapes: Choose between Race Master (Straight Stem) and Race Flo shapes to suit your racing engine's specific requirements.Recommended for Alcohol Engines: These valves are the recommended choice for exhaust valves in alcohol engines, ensuring reliable performance even in demanding conditions.

Manley Chevy LS 8mm Stem Severe Duty Custom Stainless Exhaust Valves Blank (Set of 8)

Manley Chevy LS 8mm Stem Race Series Custom Stainless Exhaust Valves Blank (Set of 8)

Manley Gen II 1.65in Pro-Flo Custom Stainless Steel Exhaust Valves (Set of 8)

Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity and wear resistance.Swirl Polished and Fully Machined: The valves feature swirl polished under head areas and fully machined combustion faces to optimize airflow and combustion efficiency.Variety of Shapes: Choose between Race Master (Straight Stem) and Race Flo shapes to suit your racing engine's specific requirements.Recommended for Alcohol Engines: These valves are the recommended choice for exhaust valves in alcohol engines, ensuring reliable performance even in demanding conditions.This Part Fits: Year Make Model Submodel 1996-1997 Lexus LX450 Base 1993-1997 Toyota Land Cruiser Base

Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity and wear resistance.Swirl Polished and Fully Machined: The valves feature swirl polished under head areas and fully machined combustion faces to optimize airflow and combustion efficiency.Variety of Shapes: Choose between Race Master (Straight Stem) and Race Flo shapes to suit your racing engine's specific requirements.Recommended for Alcohol Engines: These valves are the recommended choice for exhaust valves in alcohol engines, ensuring reliable performance even in demanding conditions.This Part Fits: Year Make Model Submodel 1996-1997 Lexus LX450 Base 1993-1997 Toyota Land Cruiser Base

Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity and wear resistance.Swirl Polished and Fully Machined: The valves feature swirl polished under head areas and fully machined combustion faces to optimize airflow and combustion efficiency.Variety of Shapes: Choose between Race Master (Straight Stem) and Race Flo shapes to suit your racing engine's specific requirements.Recommended for Alcohol Engines: These valves are the recommended choice for exhaust valves in alcohol engines, ensuring reliable performance even in demanding conditions.This Part Fits: Year Make Model Submodel 1996-1997 Lexus LX450 Base 1993-1997 Toyota Land Cruiser Base

Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity and wear resistance.Swirl Polished and Fully Machined: The valves feature swirl polished under head areas and fully machined combustion faces to optimize airflow and combustion efficiency.Variety of Shapes: Choose between Race Master (Straight Stem) and Race Flo shapes to suit your racing engine's specific requirements.Recommended for Alcohol Engines: These valves are the recommended choice for exhaust valves in alcohol engines, ensuring reliable performance even in demanding conditions.This Part Fits: Year Make Model Submodel 1996-1997 Lexus LX450 Base 1993-1997 Toyota Land Cruiser Base

Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity and wear resistance.Swirl Polished and Fully Machined: The valves feature swirl polished under head areas and fully machined combustion faces to optimize airflow and combustion efficiency.Variety of Shapes: Choose between Race Master (Straight Stem) and Race Flo shapes to suit your racing engine's specific requirements.Recommended for Alcohol Engines: These valves are the recommended choice for exhaust valves in alcohol engines, ensuring reliable performance even in demanding conditions.

Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity and wear resistance.Swirl Polished and Fully Machined: The valves feature swirl polished under head areas and fully machined combustion faces to optimize airflow and combustion efficiency.Variety of Shapes: Choose between Race Master (Straight Stem) and Race Flo shapes to suit your racing engine's specific requirements.Recommended for Alcohol Engines: These valves are the recommended choice for exhaust valves in alcohol engines, ensuring reliable performance even in demanding conditions.

Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity and wear resistance.Swirl Polished and Fully Machined: The valves feature swirl polished under head areas and fully machined combustion faces to optimize airflow and combustion efficiency.Variety of Shapes: Choose between Race Master (Straight Stem) and Race Flo shapes to suit your racing engine's specific requirements.Recommended for Alcohol Engines: These valves are the recommended choice for exhaust valves in alcohol engines, ensuring reliable performance even in demanding conditions.This Part Fits: Year Make Model Submodel 1991-1993,1995-1998 Nissan 240SX Base 1991-1992,1997-1998 Nissan 240SX LE 1989-1998 Nissan 240SX SE 1989-1990 Nissan 240SX XE

Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity and wear resistance.Swirl Polished and Fully Machined: The valves feature swirl polished under head areas and fully machined combustion faces to optimize airflow and combustion efficiency.Variety of Shapes: Choose between Race Master (Straight Stem) and Race Flo shapes to suit your racing engine's specific requirements.Recommended for Alcohol Engines: These valves are the recommended choice for exhaust valves in alcohol engines, ensuring reliable performance even in demanding conditions.This Part Fits: Year Make Model Submodel 1991-1993,1995-1998 Nissan 240SX Base 1991-1992,1997-1998 Nissan 240SX LE 1989-1998 Nissan 240SX SE 1989-1990 Nissan 240SX XE

Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity and wear resistance.Swirl Polished and Fully Machined: The valves feature swirl polished under head areas and fully machined combustion faces to optimize airflow and combustion efficiency.Variety of Shapes: Choose between Race Master (Straight Stem) and Race Flo shapes to suit your racing engine's specific requirements.Recommended for Alcohol Engines: These valves are the recommended choice for exhaust valves in alcohol engines, ensuring reliable performance even in demanding conditions.This Part Fits: Year Make Model Submodel 1993-2005 Lexus GS300 Base 2001-2005 Lexus IS300 Base 2002-2005 Lexus IS300 Sportcross 1992-2000 Lexus SC300 Base 1993-1998 Toyota Supra Base 1993-1998 Toyota Supra Twin Turbo

Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity and wear resistance.Swirl Polished and Fully Machined: The valves feature swirl polished under head areas and fully machined combustion faces to optimize airflow and combustion efficiency.Variety of Shapes: Choose between Race Master (Straight Stem) and Race Flo shapes to suit your racing engine's specific requirements.Recommended for Alcohol Engines: These valves are the recommended choice for exhaust valves in alcohol engines, ensuring reliable performance even in demanding conditions.This Part Fits: Year Make Model Submodel 1993-2005 Lexus GS300 Base 2001-2005 Lexus IS300 Base 2002-2005 Lexus IS300 Sportcross 1992-2000 Lexus SC300 Base 1993-1998 Toyota Supra Base 1993-1998 Toyota Supra Twin Turbo

The MagnaFlow 1964-1966 Ford Mustang Performance Exhaust Manifold Down Pipe 16445 is a premium, weight-optimized mandrel bent exhaust component designed for superior flow characteristics and engineered to enhance the performance of your 1964-1966 Ford Mustang 4.7L. Each 16445 is produced using precision CNC robotic manufacturing techniques and features 100% durable, corrosion resistant stainless steel construction. Professional installation is highly recommended.This Part Fits: Year Make Model Submodel 1964-1966 Ford Mustang Base 1965-1966 Ford Mustang Shelby GT-350 1966 Ford Mustang Shelby GT-350H

The MagnaFlow Performance Exhaust Manifold Down Pipe 16434 16434 is a premium, weight-optimized mandrel bent exhaust component designed for superior flow characteristics and engineered to enhance the performance of your 1967-1973 Chevrolet 5.0L, 5.3L, 5.7L. Each 16434 is produced using precision CNC robotic manufacturing techniques and features 100% durable, corrosion resistant stainless steel construction. Professional installation is highly recommended.This Part Fits: Year Make Model Submodel 1967-1974 Chevrolet Camaro Base 1973-1974 Chevrolet Camaro LT 1967-1973 Chevrolet Camaro RS 1967-1972 Chevrolet Camaro SS 1967,1970-1973 Chevrolet Camaro Z28 1969-1973 Chevrolet Nova Base 1973 Chevrolet Nova Custom

The MagnaFlow 1966-1972 Chevrolet C10 Pickup Performance Exhaust Manifold Down Pipe 15380 is a premium, weight-optimized mandrel bent exhaust component designed for superior flow characteristics and engineered to enhance the performance of your 1966-1972 Chevrolet C10 Pickup 4.6L, 5.0L, 5.3L, 5.7L. Each 15380 is produced using precision CNC robotic manufacturing techniques and features 100% durable, corrosion resistant stainless steel construction. Professional installation is highly recommended.This Part Fits: Year Make Model Submodel 1966-1972 Chevrolet C10 Pickup Base

Complete your custom exhaust with a Black coated straight-through design muffler with an integrated welded tip for a finished look and simple installation.

MagnaFlow Black Mufflers showcase our iconic Smooth Deep Tone, Wide-Open Performance gains over OEM equipment, a true Straight-Through design, and Stainless Steel Construction, but with the added protection and aggressive style of a High Temp Satin Black Coating applied from muffler body to tip.User 1

Complete your custom exhaust with a Black coated straight-through design muffler with an integrated welded tip for a finished look and simple installation.

Complete your custom exhaust with a straight-through design muffler with an integrated welded tip for a finished look and simple installation.

Complete your custom exhaust with a straight-through design muffler with an integrated welded tip for a finished look and simple installation.

Complete your custom exhaust with a straight-through design muffler with an integrated welded tip for a finished look and simple installation.

Complete your custom exhaust with a straight-through design muffler with an integrated welded tip for a finished look and simple installation.

Complete your custom exhaust with a straight-through design muffler with an integrated welded tip for a finished look and simple installation.

Complete your custom exhaust with a straight-through design muffler with an integrated welded tip for a finished look and simple installation.

Complete your custom exhaust with a straight-through design muffler with an integrated welded tip for a finished look and simple installation.

The MagnaFlow 5 X 8in. Oval Straight-Through Performance Exhaust Muffler 14468 brings our signature sound and dyno-proven performance to your ride with a free-flowing straight-through perforated stainless steel core wrapped in stainless steel mesh and acoustic fiber fill, and a weight-optimized, reversible 2.5/2.5in. diameter inlet/outlet Straight-Through layout. Muffler 14468s 5x8x18in. oval-shaped body features a premium, brushed finish for an elevated aesthetic that matches the enhanced exhaust note and performance that this muffler brings to your ride. The universal design allows for flexible placement of 14468 within your exhaust system to meet the specific spacing requirements of your vehicle, although professional installation is highly recommended. 14468 is made of durable, corrosion resistant stainless steel and produced using cutting-edge CNC precision robotic manufacturing techniques, all backed by MagnaFlow's limited lifetime construction warranty.

The MagnaFlow 7 X 7in. Round Straight-Through Performance Exhaust Muffler 12774 is engineered to enhance your ride with a healthy helping of our signature exhaust sound and dyno-proven performance thanks to its free-flowing straight-through perforated stainless steel core wrapped in stainless steel mesh and acoustic fiber fill. The reversible, universal 5/5in. diameter inlet/outlet Straight-Through layout allows you to install it in whatever orientation and configuration you see fit. However, professional installation is highly recommended. Muffler 12774s weight-optimized 7x7x24in. oval-shaped body features a satin finish that elevates the overall aesthetics of your current exhaust setup. 12774 is made of durable, corrosion resistant stainless steel and produced using cutting-edge CNC precision robotic manufacturing techniques, all backed by MagnaFlow's limited lifetime construction warranty.

The MagnaFlow 7in. Round Straight-Through Performance Exhaust Muffler 12761 brings our world-famous exhaust sound and dyno-proven performance to your ride in a weight-optimized 7x7x27in. package with a premium satin finish. The straight-through free-flowing design of this round-bodied muffler's reversible, universal 2.5/2.25in. diameter inlet/outlet layout enables versatile installation options to match the spacing requirements of your vehicle. Due to the cutting and welding involved, professional installation is highly recommended. Internally, 12761 utilizes a perforated stainless steel core wrapped in stainless steel mesh and acoustic fiber fill to achieve a powerful, resonant tone. This muffler is made of durable, corrosion resistant stainless steel and produced using cutting-edge CNC precision robotic manufacturing techniques, all backed by MagnaFlow's limited lifetime construction warranty.

The MagnaFlow 5 X 11in. Oval Straight-Through Performance Exhaust Muffler 12595 is engineered to enhance your ride with a healthy helping of our signature exhaust sound and dyno-proven performance thanks to its free-flowing straight-through perforated stainless steel core wrapped in stainless steel mesh and acoustic fiber fill. The reversible, universal 3.5/3in. diameter inlet/outlet Straight-Through layout allows you to install it in whatever orientation and configuration you see fit. However, professional installation is highly recommended. Muffler 12595s weight-optimized 5x11x22in. oval-shaped body features a satin finish that elevates the overall aesthetics of your current exhaust setup. 12595 is made of durable, corrosion resistant stainless steel and produced using cutting-edge CNC precision robotic manufacturing techniques, all backed by MagnaFlow's limited lifetime construction warranty.

The MagnaFlow 5 X 11in. Oval Straight-Through Performance Exhaust Muffler 12594 is engineered to enhance your ride with a healthy helping of our signature exhaust sound and dyno-proven performance thanks to its free-flowing straight-through perforated stainless steel core wrapped in stainless steel mesh and acoustic fiber fill. The reversible, universal 4/3in. diameter inlet/outlet Straight-Through layout allows you to install it in whatever orientation and configuration you see fit. However, professional installation is highly recommended. Muffler 12594s weight-optimized 5x11x22in. oval-shaped body features a satin finish that elevates the overall aesthetics of your current exhaust setup. 12594 is made of durable, corrosion resistant stainless steel and produced using cutting-edge CNC precision robotic manufacturing techniques, all backed by MagnaFlow's limited lifetime construction warranty.