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Twisted Steel Header & Connection Pipe; Street Series

Jeep Wrangler (TJ/LJ) 00-06 I6-4.0L
Part Number: 48-48020-YC

MSRP: $1,803.99


Twisted Steel Headers Features:
•1-1/2" 14-gauge stainless steel mandrel-bent tubing for unrestricted flow
•Utilizes formed collectors to decrease turbulence and increases exhaust velocity
•Optimized tube lengths improve flow and performance
•100% hand MIG-welded construction ensures optimal strength and durability
•1/2" thick laser-cut head flanges designed to match the head port for a leak-free seal
Connection Pipe (Street) Features:
•Constructed of 2-1/2 mandrel-bent stainless steel tubing
•Incorporates a catalytic converter
•Outlets connect directly to OE exhaust
•Heavy-duty flanges and OE-style gaskets are used to maintain a leak-free seal
Test Results:
•Added an extra +2horsepower and +7 lbs. x ft. of torque as verified by our in house dyno (tested on 2001 Jeep Wrangler I6-4.0L)

aFe is proud to introduce an all new “street” Twisted Steel long tube header/Connection Pipe combo for the 2000-2006 Jeep Wrangler (LJ/TJ) with I6-4.0L engine. Designed to replace the extremely restrictive exhaust manifold, the performance Twisted Steel long-tube header is constructed of 1-1/2”, 14 gauge, mandrel-bent, stainless steel tubing for strength and durability. The smooth curves and increased diameter of this header helps remove restriction and keeps exhaust gas flowing smoothly for improved performance and durability on and off the trails. In testing, this system resulted in gains up to +2 horsepower and +7 lbs. x ft. of torque, as measured on our in-house dyno. The header comes with a 1/2" thick laser-cut head flange that is designed to match the head port for a leak-free seal. Formed collectors are used on the header to decrease turbulence and increase exhaust velocity for maximum performance. The high-flowing Connection Pipe is designed with a high flow catalytic converter and 2-1/2” mandrel-bent tubing for optimum flow resulting in added horsepower and torque. This system is designed to fit as a combo with all necessary hardware for a hassle-free installation.

Stainless Steel Construction:
This system is constructed of durable mandrel bent stainless steel tubing for maximum performance, corrosion resistance and strength, eliminating cracking.

Factory Mounting Locations:
Utilizes factory mounting locations making it a true bolt-on system and includes all necessary hardware for a hassle-free installation.

Formed Collectors:
Utilize formed collectors to decrease turbulence and increases exhaust velocity. The result is increased horsepower, torque and improved throttle response.

Optimized Tube Lengths:
Tube lengths are optimized for true pulse control technology which improves flow and performance.

1/2" Laser-Cut Flanges:
These headers come with 1/2" thick laser-cut head flanges and gaskets that are designed to match the head port for a leak-free seal.

Connection Pipe (Street):
High-Flow Catalytic Converter:
This system incorporates a 400 CPSI (cell per square inch) catalytic converter for maximum flow.
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Mandrel-Bent Tubing:
The performance Connection Pipe is constructed of durable 2-1/2 mandrel bent, stainless steel and connect directly to the OE or aFe exhaust.

Note this system fits:
2000-2006 Jeep Wrangler (TJ)
2004-2006 Jeep Wrangler Unlimited (LJ)

aFe headers and exhaust are engineered and manufactured in our Corona, California manufacturing facility.

Note: 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.? ?


Vehicle Applications

Year Make Model SubModel Engine Fuel
2000-2006Jeep Wrangler TJ I6 4.0L Gas
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