Description:
Unleash the full potential of your 3rd Gen Toyota 4Runner 3.4L V6 with the Doug Thorley THY-507-S-C Long Tube Header Kit, engineered for models with an external EGR tube. This complete system includes silver ceramic-coated long tube headers and a high-flow Y-pipe to maximize exhaust flow from the heads to the rest of your exhaust system.
The 3:1 header design improves torque and horsepower throughout the RPM range, making it perfect for off-road adventures, towing, or spirited highway driving. Built from 14-gauge steel with a heat-resistant silver ceramic coating, these headers deliver both performance and durability.
The included Y-pipe features mandrel-bent tubing for smoother exhaust flow and a 2.5” outlet that must be welded to your exhaust inlet for a secure, leak-free connection.
Key Specs:
- Fits: 1996–2002 Toyota 4Runner 3.4L V6 (5VZ-FE) with external EGR tube
- Includes: Long tube headers + Y-pipe kit
- Header Style: 3:1
- Material: 14-gauge steel with silver ceramic coating
- Primary Tube Diameter: 1-1/2"
- Collector Diameter: 2-1/4"
- Y-Pipe Inlet Diameter: 2-1/4"
- Y-Pipe Outlet Diameter: 2-1/2" (weld-on)
- Flange Thickness: 3/8"
- Hardware Included: Yes
- Uses factory manifold gaskets
- CARB E.O. #: D-540-6 (50-state legal)
- Warranty: Limited Lifetime to original purchaser
Performance Benefits:
- Significant torque and horsepower gains across the RPM band
- Improved throttle response
- Reduced backpressure for more efficient combustion
- Durable, corrosion-resistant ceramic coating
- Includes complete Y-pipe for optimal flow
