Kooks Headers · New
Kooks Universal Nascar Modified Spec Muffler
MPN QCN350 · Store SKU kshQCN350
Supplier stock checked 11/7/2026, 9:31:37 AM 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!" 3-1/2in. NASCAR Whelen Modified Spec Muffler. Polished Stainless Steel. Quad-Core Style Directional Muffler. 8in. Long Body. 16in. Overall Length. 5in. O.D. Body. 3-1/2in. I.D. Inlet. 3-1/2in. O.D. Outlet. Sold Individually. 3-1/2in. NASCAR Whelen Modified Spec. Muffler-8in. Long Body 3-1/2" NASCAR Whelen Modified Spec. Muffler - 8" Long Body
Manufacturer fitment & guides
- 3-1/2" NASCAR Whelen Modified Spec Muffler Polished Stainless SteelQuad-Core Style Directional Muffler 8” Long Body16" Overall Length5" O.D. Body3-1/2" I.D. Inlet3-1/2" O.D. Outlet Sold Individually
- Manufacturer-supplied application summary from Turn14; this may not be an exhaustive fitment list.
Part-specific notes
- California Proposition 65: Y
