aFe Twisted Steel Header Exhaust Manifold For 91-99 Jeep YJ TJ XJ ZJ 4.0L I6 for Sale


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Price: $781.00

This is a brand new aFe Power Twisted Steel Header. We are an Authorized Dealer of Advanced Flow Engineering and carry the full line of products.

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. in recent dyno testing, this header produced 7 hp and 9 lbs. x ft. of torque. Twisted Steel headers are 100% bolt-on with no modifications necessary and are proudly engineered and built in Corona, CA.Mitered Collectors: Mitered collectors extend the tube length into the flange which decreases turbulence and increases exhaust velocity. The result is increased horsepower, torque and improved throttle response.Tig-Welded: 100% TIG-Welded by certified craftsmen for race proven strength and durability. TIG-Welding provides the strongest welds reducing stress cracks.1/2" Thick Head Flange: A 1/2" thick head flange is used for maximum strength and durability. The flange design is identical to the head port and is machined flat for a leak-free seal.409 SS Construction: This header is constructed of durable CNC mandrel bent 14-gauge 409 stainless steel tubing for maximum performance, corrosion resistance and strength eliminating cracking.Premium Gasket: A premium intake/exhaust flange gasket with aluminum fire rings is provided for a leak-free seal. The gasket is port matched for a perfect seal.Twisted Steel Headers come with a Limited Lifetime Warranty.

Fits the following applications:

'91-'99 Jeep Wrangler YJ & TJ 4.0L I6
'91-'99 Jeep Cherokee XJ 4.0L I6
'91-'92 Jeep Comanche MJ 4.0L I6
'93-'98 Jeep Grand Cherokee ZJ 4.0L I6

Part #: 48-46201- 7 HP gain
- 9 lbs x ft. gain

aFe Power Twisted Steel Header Features:

  • Manufactured and assembled in the USA
  • TIG-welded for maximum strength
  • 1/2" flange for a leak-free seal
  • Durable 14-gauge 409 stainless steel construction with optimized tube lengths
  • Mitered merged collectors for maximum flow and reduced turbulence
  • Gain more horsepower and torque

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