Headers & Manifolds

aFe’s Twisted Steel headers outflow and outperform the Ford diesel factory exhaust manifolds for a true, bolt-on performance header system. These precision-designed, hand-crafted headers are mandrel-bent from 1-3/4″ into 2″ heavy duty gauge .120″ wall, brushed finish 304 stainless steel tubing and are 100% hand TIG-welded for strength and durability. Optimized tube lengths deliver true pulse control technology for improved flow and performance across the power band. Laser-cut, heavy duty head flanges are machined to match the exhaust ports for a secure seal. EGT ports with plugs, quality hardware and gaskets are included to ensure hassle-free installation and quality fit.
Performance Gains: Outflows factory manifolds by up to 7%.
Brushed Finish 304 Stainless Steel Construction: Constructed of brushed finish .120″ wall, 1-3/4″ into 2″ mandrel-bent 304 stainless steel tubing for strength and durability.
Optimized Tube Lengths: Tube lengths and mitered collectors are optimized for true pulse control technology which improves flow and performance across the power band.
Heavy Duty Flanges: These headers incorporate laser-cut, heavy duty flanges machined to match the exhaust ports for a direct-bolt on, leak-free seal.
EGT Ports: Two 1/8″ NPT exhaust gas temperature (EGT) ports are incorporated. This allows for easy installation of sensors, gauges or testing equipment.
TIG-Welded: 100% TIG-welded for strength and durability.
All aFe exhaust systems are engineered and manufactured in our Corona, California manufacturing facility.
Twisted Steel 1-3/4 IN to 2 IN 304 Stainless Headers Ford Diesel Trucks 03-07 V8-6.0L (td)

The new Twisted Steel performance header from aFe Power is redefining the header industry with new pulse control technology. aFe engineers have designed this header using optimum tube lengths and mitered collectors for maximum flow and velocity for power delivery across the entire power band. Combine with a large 1/2″ thick head flange and 14-gauge 409 stainless steel tubing, you have a header that is strong and powerful. Twisted Steel headers are 100-percent bolt-on with no modifications necessary and are proudly engineered and built in Corona, CA.
Twisted Steel 409 Stainless Steel Shorty Header Jeep Wrangler (YJ/TJ) 91-99 L6-4.0L

The new Twisted Steel performance header from aFe Power is redefining the header industry with new pulse control technology. aFe engineers have designed this header using optimum tube lengths and mitered collectors for maximum flow and velocity for power delivery across the entire power band. Combine with a large 1/2″ thick head flange and 14-gauge 409 stainless steel tubing, you have a header that is strong and powerful. Twisted Steel headers are 100-percent bolt-on with no modifications necessary and are proudly engineered and built in Corona, CA.
Twisted Steel 409 Stainless Steel Shorty Header Nissan Frontier 05-19/Pathfinder 05-12/Xterra 05-15 V6-4.0L

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 stainless steel tubing and a 1/2″ laser cut T-3 divided flange builds quicker turbo boost, improves throttle response and overall performance. TIG welded for strength and durability, this system is equipped with 1/8″ EGT ports for auxiliary equipment. 1-3/4″ – 2″ 304 stainless steel tubing, is used to increase exhaust velocity and increase usable torque. This means a more aggressive throttle response and increased passing power. Durable mandrel bent brushed 304 stainless steel tubing for corrosion resistance. 100% TIG-Welded by certified craftsmen provides the strongest welds reducing stress cracks for race proven strength and durability. This system utilizes a divided T-3 flange that allows for a increase exhaust velocity, turbo spool, and boost.
Twisted Steel Header Turbo Manifold (T3) Dodge Diesel Trucks 98.5-02 L6-5.9L (td)

Construction: These unique up pipes are constructed of 2″ mandrel-bent 304 stainless steel tubing with a .120″ wall for strength and durability. 2″ Inner Liner Flex Pipes: The up-pipes utilizes heavy duty 2″ flex tubes with internal inner liner. Leak-Free Seal: High quality 3/8″ thick flanges are used for a complete 360 degree sealing surface. Note: This is a “Race Only” product used s olely for competition. Its use is limited to closed-course and open-course racing that is formally sanctioned by a recognized racing organization. Any other use including recreational off-road use could be in violation of local, state and federal laws.
Twisted Steel Header Up-Pipe Ford Diesel Trucks 08-10 V8-6.4L (td)

aFe Power’s New Twisted Steel Headers deliver +6 HP and +6 lbs. x ft. torque over the factory exhaust manifolds. The headers are constructed of 1-1/2″ 14-gauge 409 stainless steel tubing with 3/8″ thick flanges to ensure a leak free seal. To eliminate dead space that can cause turbulence and hinder flow that formed collectors are prone to produce, true mitered collectors are used for true pulse control technology improving flow and performance. The smooth curves and increased diameter of this header helps remove restriction and keeps exhaust gas flowing smoothly for improved performance and durability. Factory Mounting Locations: These headers retain your stock catalytic converters and are a direct bolt-on installation which requires no cutting or drilling to provide a hassle-free installation. Mitered Collectors: Mitered collectors decrease turbulence and increases exhaust velocity. The result is increased horsepower, torque and improved throttle response. Heavy Duty Flanges: 3/8″ thick flanges prevent warpage to ensure a leak-free seal over the life of the vehicle. Note 1: aFe recommends purchasing spark plug wire boot protectors (P/N: 48-90001) and gaskets (P/N: 48-90004) for additional protection for a hassle-free installation. Spark plug boot protectors provide up to 1600F protection for your spark plug wires. Gaskets ensure a leak free seal for a hassle-free installation. Note 2: This system is not currently CARB exempt and is not available for sale in California or for use on any vehicle registered with the California Department of Motor Vehicle.
Twisted Steel 409 Stainless Steel Shorty Header Jeep Wrangler (JK) 07-11 V6-3.8L

Unleash more torque and horsepower with this Twisted Steel Header for your RAM 1500 HEMI. Optimized, 1-5/8″ mandrel bent, 304 stainless-steel tubing improves exhaust flow for quicker throttle response and overall performance. Mandrel bent, 1-5/8″ 16-gauge 304 stainless steel tubing construction for unrestrictive flow resulting in more aggressive throttle response and increased passing power. 100% MIG welded by certified craftsmen provides the strongest welds for long lasting strength and durability. Designed with true 4-to-1 mitered merge collectors to eliminate flow-block turbulence created by formed collectors. 3/8″ thick, 1-piece flanges prevent warpage to ensure a leak-free seal over the life of the vehicle. Includes quality gaskets and hardware. These headers retain your stock catalytic converters and are a direct bolt-on installation which requires no cutting or drilling to provide a hassle-free installation.Unleash more torque and horsepower with this Twisted Steel Header for your RAM 1500 HEMI. Optimized, 1-5/8″ mandrel bent, 304 stainless-steel tubing improves exhaust flow for quicker throttle response and overall performance.
Twisted Steel 304 Stainless Steel Short Tube Header RAM 1500 (DT) 19-24 V8-5.7L HEMI

This header is covered by California Air Resources Board Executive Order (E.O.) # D-276-12 for the 2001-2003 Subaru Impreza WRX. Gaskets are NOT included. Reuse O.E. gaskets or purchase gaskets separately. Increased performance through efficient flow, Greater durability through high quality, T-304 stainless steel, material and a unique, stiffened, flex joint. Each header is built from premium T-304 austenitic stainless steel, superior to T-400 series knockoffs (such as 409), to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit. Best of all, it’s made in the USA and backed by the BORLA(r) Million-Mile Warranty. Just what you’d expect from the world’s most experienced (and most winning) exhaust brand.
Header 2001-2003 Subaru Impreza WRX 2.0L 4 Cyl.. Turbo Automatic/ Manual Transmission All Wheel Drive 4 Door/ Wagon.
Million Mile Warranty
2001-2003 Subaru Impreza WRX 2.0L 4 Cyl.. Turbo Automatic/ Manual Transmission All Wheel Drive 4 Door/ Wagon.