aFe Twisted Steel Header SS-409 Exhaust Manifold — Fits Jeep Wrangler YJ I6-4.0L 1991-1999

SKU: AFE48-46201
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About aFe aFe Power is the racing-bred air, exhaust, and ...Read More

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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About aFe

aFe Power is the racing-bred air, exhaust, and intercooler brand. From Magnum FORCE intakes to ATLAS exhausts and BladeRunner intercoolers, every aFe product is dyno-tuned for measurable HP and torque gains on Ford, GM, Ram, and import platforms.

Watch in action

Maximize Your Jeep Wrangler YJ's Power with aFe Twisted Steel Headers

Transform your Jeep Wrangler YJ (1991-1999) with the aFe Twisted Steel Performance Header. Engineered for the iconic I6-4.0L engine, this header is designed to unlock significant performance gains and enhance your off-road or daily driving experience.

Advanced Exhaust Flow Technology

aFe Power's Twisted Steel header utilizes cutting-edge Pulse Control Technology. By carefully designing optimum tube lengths and employing mitered collectors, this header ensures maximum exhaust gas flow and velocity. This meticulous engineering results in a noticeable increase in horsepower and torque, providing a more powerful and responsive feel throughout the RPM range.

Robust Construction for Demanding Use

  • Premium Materials: Constructed from durable 14-gauge 409 stainless steel tubing for exceptional strength and corrosion resistance.
  • Solid Seal: Features a thick 1/2" head flange, guaranteeing a robust and leak-free connection to your engine.
  • Easy Installation: Designed as a 100% bolt-on component, eliminating the need for complex modifications.

Vehicle Compatibility:

  • Jeep Wrangler YJ: 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999 (All Submodels with 4.0L I6)
  • Also fits: Select Jeep Cherokee (XJ) and Comanche (MJ) models with the 4.0L I6 engine.

Proudly engineered and manufactured in Corona, CA, this header is built to withstand the rigors of adventure while delivering peak performance. Upgrade your Jeep's exhaust system with a component that combines power, durability, and precision engineering.

Discover the performance edge with the aFe Twisted Steel Header, available at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1991-1992 Jeep Cherokee Briarwood
1991-1992 Jeep Cherokee Laredo
1991-1992 Jeep Cherokee Limited
1991-1993 Jeep Cherokee Base
1991-1999 Jeep Cherokee Sport
1993-1997 Jeep Cherokee Country
1996 Jeep Cherokee Classic
1998-1999 Jeep Cherokee Classic
1998-1999 Jeep Cherokee Limited
1991-1992 Jeep Comanche Base
1991-1992 Jeep Comanche Eliminator
1991-1992 Jeep Comanche Pioneer
1993 Jeep Grand Cherokee Base
1993-1998 Jeep Grand Cherokee Laredo
1993-1998 Jeep Grand Cherokee Limited
1994-1995 Jeep Grand Cherokee SE
1997 Jeep Grand Cherokee Orvis
1997-1998 Jeep Grand Cherokee TSi
1991-1992 Jeep Wrangler Islander
1991-1993 Jeep Wrangler Base
1991-1994 Jeep Wrangler Renegade
1991-1995 Jeep Wrangler Sahara
1994-1995 Jeep Wrangler SE
1997-1999 Jeep Wrangler Sport

Product Details

Product Description
Part Numbers
Sizing & Fit

About aFe

aFe Power is the racing-bred air, exhaust, and intercooler brand. From Magnum FORCE intakes to ATLAS exhausts and BladeRunner intercoolers, every aFe product is dyno-tuned for measurable HP and torque gains on Ford, GM, Ram, and import platforms.

Watch in action

Maximize Your Jeep Wrangler YJ's Power with aFe Twisted Steel Headers

Transform your Jeep Wrangler YJ (1991-1999) with the aFe Twisted Steel Performance Header. Engineered for the iconic I6-4.0L engine, this header is designed to unlock significant performance gains and enhance your off-road or daily driving experience.

Advanced Exhaust Flow Technology

aFe Power's Twisted Steel header utilizes cutting-edge Pulse Control Technology. By carefully designing optimum tube lengths and employing mitered collectors, this header ensures maximum exhaust gas flow and velocity. This meticulous engineering results in a noticeable increase in horsepower and torque, providing a more powerful and responsive feel throughout the RPM range.

Robust Construction for Demanding Use

  • Premium Materials: Constructed from durable 14-gauge 409 stainless steel tubing for exceptional strength and corrosion resistance.
  • Solid Seal: Features a thick 1/2" head flange, guaranteeing a robust and leak-free connection to your engine.
  • Easy Installation: Designed as a 100% bolt-on component, eliminating the need for complex modifications.

Vehicle Compatibility:

  • Jeep Wrangler YJ: 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999 (All Submodels with 4.0L I6)
  • Also fits: Select Jeep Cherokee (XJ) and Comanche (MJ) models with the 4.0L I6 engine.

Proudly engineered and manufactured in Corona, CA, this header is built to withstand the rigors of adventure while delivering peak performance. Upgrade your Jeep's exhaust system with a component that combines power, durability, and precision engineering.

Discover the performance edge with the aFe Twisted Steel Header, available at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1991-1992 Jeep Cherokee Briarwood
1991-1992 Jeep Cherokee Laredo
1991-1992 Jeep Cherokee Limited
1991-1993 Jeep Cherokee Base
1991-1999 Jeep Cherokee Sport
1993-1997 Jeep Cherokee Country
1996 Jeep Cherokee Classic
1998-1999 Jeep Cherokee Classic
1998-1999 Jeep Cherokee Limited
1991-1992 Jeep Comanche Base
1991-1992 Jeep Comanche Eliminator
1991-1992 Jeep Comanche Pioneer
1993 Jeep Grand Cherokee Base
1993-1998 Jeep Grand Cherokee Laredo
1993-1998 Jeep Grand Cherokee Limited
1994-1995 Jeep Grand Cherokee SE
1997 Jeep Grand Cherokee Orvis
1997-1998 Jeep Grand Cherokee TSi
1991-1992 Jeep Wrangler Islander
1991-1993 Jeep Wrangler Base
1991-1994 Jeep Wrangler Renegade
1991-1995 Jeep Wrangler Sahara
1994-1995 Jeep Wrangler SE
1997-1999 Jeep Wrangler Sport

Product Details

Product Description

About aFe

aFe Power is the racing-bred air, exhaust, and intercooler brand. From Magnum FORCE intakes to ATLAS exhausts and BladeRunner intercoolers, every aFe product is dyno-tuned for measurable HP and torque gains on Ford, GM, Ram, and import platforms.

Watch in action

Maximize Your Jeep Wrangler YJ's Power with aFe Twisted Steel Headers

Transform your Jeep Wrangler YJ (1991-1999) with the aFe Twisted Steel Performance Header. Engineered for the iconic I6-4.0L engine, this header is designed to unlock significant performance gains and enhance your off-road or daily driving experience.

Advanced Exhaust Flow Technology

aFe Power's Twisted Steel header utilizes cutting-edge Pulse Control Technology. By carefully designing optimum tube lengths and employing mitered collectors, this header ensures maximum exhaust gas flow and velocity. This meticulous engineering results in a noticeable increase in horsepower and torque, providing a more powerful and responsive feel throughout the RPM range.

Robust Construction for Demanding Use

  • Premium Materials: Constructed from durable 14-gauge 409 stainless steel tubing for exceptional strength and corrosion resistance.
  • Solid Seal: Features a thick 1/2" head flange, guaranteeing a robust and leak-free connection to your engine.
  • Easy Installation: Designed as a 100% bolt-on component, eliminating the need for complex modifications.

Vehicle Compatibility:

  • Jeep Wrangler YJ: 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999 (All Submodels with 4.0L I6)
  • Also fits: Select Jeep Cherokee (XJ) and Comanche (MJ) models with the 4.0L I6 engine.

Proudly engineered and manufactured in Corona, CA, this header is built to withstand the rigors of adventure while delivering peak performance. Upgrade your Jeep's exhaust system with a component that combines power, durability, and precision engineering.

Discover the performance edge with the aFe Twisted Steel Header, available at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1991-1992 Jeep Cherokee Briarwood
1991-1992 Jeep Cherokee Laredo
1991-1992 Jeep Cherokee Limited
1991-1993 Jeep Cherokee Base
1991-1999 Jeep Cherokee Sport
1993-1997 Jeep Cherokee Country
1996 Jeep Cherokee Classic
1998-1999 Jeep Cherokee Classic
1998-1999 Jeep Cherokee Limited
1991-1992 Jeep Comanche Base
1991-1992 Jeep Comanche Eliminator
1991-1992 Jeep Comanche Pioneer
1993 Jeep Grand Cherokee Base
1993-1998 Jeep Grand Cherokee Laredo
1993-1998 Jeep Grand Cherokee Limited
1994-1995 Jeep Grand Cherokee SE
1997 Jeep Grand Cherokee Orvis
1997-1998 Jeep Grand Cherokee TSi
1991-1992 Jeep Wrangler Islander
1991-1993 Jeep Wrangler Base
1991-1994 Jeep Wrangler Renegade
1991-1995 Jeep Wrangler Sahara
1994-1995 Jeep Wrangler SE
1997-1999 Jeep Wrangler Sport

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