Stainless Works · New
Stainless Works 4in OD 4.75in Body 5in Length Race Muffler
MPN RM40 · Store SKU sswRM40
Supplier stock checked 11/8/2026, 2:15:47 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
Race muffler, Made from 304 stainless steel for maximum corrosion resistance. This muffler has 4" OD inlet and outlet with perforated core, 4-3/4" diameter round body with an overall length of 5" with a mill finish. These are TIG welded for strength and durability. These kits come with a Five year limited warranty and proudly made in the USA. Race muffler, 304 stainless steel 4" OD inlet / outlet with a perforated core, with 4-3/4" body with the overall length of 5" and a mill finish. Stainless Works Race 4" Muffler
Manufacturer fitment & guides
Check RM40 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
- California Proposition 65: Y