Gibson · New
Gibson 15-19 GMC Sierra 2500 HD Base 6.6L 4in Filter-Back Single Exhaust - Stainless
MPN 615623 · Store SKU gib615623
Supplier stock checked 11/7/2026, 7:38:37 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
You can expect significant gains in horsepower and torque, and a lower exhaust gas temperature. Filter-Back Single Exhaust System; Stainless Single Exhaust System
Manufacturer fitment & guides
Check 615623 against the manufacturer’s application information below.
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