Kooks Headers · New
Kooks 2007+ Jeep Wrangler JK w/LS Engine Swap 3in GREEN Cat SS Y Pipe Kooks HDR Req
MPN 37103300 · Store SKU ksh37103300
Supplier stock checked 11/7/2026, 12:35:17 PM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
Kooks Headers and Exhaust has been the leader in the High Performance Exhaust Industry for over 50 Years! Since 1962, Kooks takes pride in offering the best Headers and complete exhaust systems for your street, race and off-road applications. We have won hundreds of championships and set countless records in the NHRA, IHRA, NMCA, NMRA, NASCAR, NASA, SCCA and many other racing organizations. Now with three generations of family leadership, we are proud to say that all of our products are handcrafted here in the USA and we are proud to still be independently owned and operated. And don't forget, "Get Kookin with KOOKS!" 3in. SS GREEN Catted Y-Pipe for LS Swap. 2007-2018 Jeep Wrangler JK 4-Door. 3in. Stainless Steel GREEN Catted Y-Pipe Must be used with Kooks Headers. 3" SS GREEN Catted Y-Pipe for LS Swap. 2007-2018 Jeep Wrangler JK 4-Door. 3" Stainless Steel GREEN Catted Y-Pipe Must be used with Kooks Headers.
Manufacturer fitment & guides
- 2007-2018 Jeep Wrangler JK 4-Door w/LS Engine Swap. 3" Stainless Steel GREEN Catted Y-Pipe. 304 Stainless Steel Construction 3" Mandrel Bent 16 ga TubingKooks GREEN Cats 300 Cell High Flow Catalytic Converters Torca Swivel Seal style Connection on InletMust be used with Kooks Headers Part# 37102200 or 37102400 Designed to connect to Kooks Cat-Back Exhaust part# 37104100Parts designed to be used with LS Engine Swap with RPM Extreme (or similar) LS Swap Kit Minimum 2-1/2" Suspension Lift recommended For 2-Door vehicles, relocation of the fuel tank may be requiredDue to the custom nature of this part, other parts may be required for proper fitment Please contact Kooks Headers and Exhaust before ordering
- Manufacturer-supplied application summary from Turn14; this may not be an exhaustive fitment list.
A manufacturer application guide is not available for this listing. Request the exact application from JuiceBuilt before payment.
Part-specific notes
- Not CARB approved. Destination and intended-use restrictions must be checked before sale.
- Emissions acknowledgement required before purchase.
- California Proposition 65: Y
