aFe Twisted Steel Header SS-409 for Jeep Wrangler YJ 91-99 4.0L Inline Six

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 Short Tube Header Jeep Wrangler (YJ/TJ) 91-99 L6-4.0L

• Retains All OE Emission Components
• Optimized Primary Tube Lengths
• Limited Lifetime Warranty
• Pulse Control Technology
• TIG Welded Construction
• CNC Mandrel Bends

The aFe Twisted Steel Header SS-409 is engineered to enhance the performance of your Jeep Wrangler YJ from 1991 to 1999 equipped with the 4.0L inline-six engine. Crafted with precision, this header features TIG welded construction and CNC mandrel bends, ensuring optimal exhaust flow and durability. The design incorporates mitered collectors and optimized tube lengths to maximize power delivery across the entire RPM range, providing noticeable improvements in both horsepower and torque. The pulse control technology integrated into this header helps achieve a smooth exhaust pulse, reducing backpressure and increasing efficiency. Built from high-quality 14-gauge 409 stainless steel, it offers excellent corrosion resistance and strength, making it suitable for demanding off-road use. The header includes a large 1/2

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