Description
This listing covers the Kooks 3-Inch Stainless Steel GREEN Catted Y-Pipe for 2007–2018 Jeep Wrangler JK four-door with LS engine swap. This merging section brings the exhaust branches into the downstream connection. Select it around the installed headers, rear joint and chassis configuration.
Technical Details
- Manufacturer part number: 37103300.
- Construction material: Type 304 stainless steel.
- Tubing wall specification: 16 gauge.
- Tubing bends use mandrel forming.
- Tubing / connection sizing: 3 inches.
- Catalyst substrate specification: 300 cells.
- Catalyst configuration: GREEN.
- Joint design includes Torca SwivelSeal connections.
Fitment and Installation
- Vehicle application: 2007–2018 Jeep Wrangler JK four-door with LS engine swap.
- Use the compatible Kooks header configuration; verify its collector and joint style before ordering.
- Compatible header numbers: 37102200 or 37102400; downstream exhaust: 37104100.
- Uses 3-inch, 16-gauge Type 304 stainless tubing, 300-cell GREEN catalysts and Torca SwivelSeal inlet joints.
- Designed around an RPM Extreme or comparable LS-swap kit; at least 2.5 inches of suspension lift is recommended.
- Two-door installations may require relocating the fuel tank; custom swap clearance must be checked before purchase.
Before Ordering
Review engine placement, mounting hardware, suspension clearance and the complete header-to-tailpipe arrangement. Custom swap fitment requires individual confirmation.