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Emissions Disclaimer: This product is not currently CARB exempt and is not available for purchase in California or for use on any vehicle registere...

This system produced gains of up to +18 HP and +25 lbs. x Ft. TQ., as measured on our in-house dyno. This system is constructed of 1-7/8" mandrel-b...

aFe's Twisted Steel headers outflow and outperform the Ford diesel factory exhaust manifolds for a true, bolt-on performance header system. These p...

This system produced gains of up to +6 HP and +7 lbs. x Ft. TQ., as measured on our in-house dyno. This system is constructed of 1-5/8 IN mandrel-b...

This system produced gains of up to +6 HP and +7 lbs. x Ft. TQ., as measured on our in-house dyno. This system is constructed of 1-5/8 IN mandrel-b...

This system is constructed of 1-7/8 IN - 3 IN mandrel-bent 304 stainless steel tubing for maximum strength and durability. This coating combination...

This Twisted Steel Loop Delete Down Pipe replaces the factory loop section on the Jeep JL exhaust after the catalytic converter to accommodate most...

This system is constructed of 1-5/8 IN - 2-1/2 IN mandrel-bent 304 stainless steel tubing for maximum strength and durability. Includes a catalytic...

Twisted Steel 1-3/4 IN 304 Stainless Headers w/ Titanium Coat Finish Dodge Challenger 15-23 V8-6.2L (sc)/6.4L HEMIInstallation InstructionsThis Par...

This mid-pipe is constructed of durable mandrel bent brushed 304 stainless steel tubing for maximum performance, corrosion resistance and strength ...

Add dyno-proven power to your Ford Focus RS with this Twisted Steel down-pipe which produced up to +10 horsepower and +14 lbs. x ft. torque max gai...

This system is constructed of 1-5/8 IN mandrel-bent 409 stainless steel tubing for maximum strength and durability. Factory style laser cut machine...

The aFe Mach Force XP Loop Delete/Y-Pipe combo package is engineered to replace the stock loop section and y-pipe to accommodate long arm travel li...

Twisted Steel Down Pipe 2-1/2 to 2-1/4 IN 409 Stainless Steel w/ Cat Toyota Tacoma 16-19 V6-3.5LInstallation InstructionsThis Part Fits: Year Make...

100% TIG-Welded by certified craftsmen for race proven strength and durability. TIG-Welding provides the strongest welds reducing stress cracks. Pa...

Upgrade your Z4 M Coupe exhaust with the Twisted Steel 2 ½" race pipe. Mandrel bent from 304 stainless steel tubing for maximum exhaust flow and c...

If you are looking to improve performance, throttle response, and enhance the sound to your vehicle, aFe POWER Twisted Steel Headers are the answer...

This system is constructed of 1-5/8 IN mandrel-bent 409 stainless steel tubing for maximum strength and durability. Includes dual high flow catalyt...

aFe Power?s new ?Race Only? Twisted Steel Headers deliver 6 hp and 6 lbs. x ft. torque while outflowing the factory exhaust manifolds. The headers ...

The new Twisted Steel performance header from aFe Power is redefining the header industry with new pulse control technology. aFe engineers have des...

The new Twisted Steel performance header from aFe Power is redefining the header industry with new pulse control technology. aFe engineers have des...

The new Twisted Steel performance header from aFe Power is redefining the header industry with new pulse control technology. aFe engineers have des...

Unleash torque and horsepower with this Twisted Steel series header for your 24 valve Cummins. 1-3/4" head pipes stepped to 2" mandrel bent 304 sta...

Unleash torque and horsepower with this Twisted Steel series header for your Dodge Diesel. 1-3/4" head pipes stepped to 2" x .120 wall, mandrel ben...