Flowmaster · New
Flowmaster 2.5 IN(O)/OUT(OSE) 80 Series SS Muffler
MPN 842580 · Store SKU flo842580
Supplier stock checked 11/7/2026, 3:10:15 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
Flowmaster's latest version of its popular 80 Series Crossflow Muffler has a 2.50 inch inlet and outlet on the same end of the muffler case. This muffler utilizes a smaller 4.0 inch by 9.5 inch by 13.0 inch case for easier fitment on various applications and is intended for use on vehicles where a side exit in front of the rear tires is desired. Delivering a moderate to aggressive tone, this muffler is excellent for custom applications and is constructed with 409S Stainless Steel. This muffler is backed by Flowmaster's Lifetime Limited Warranty. 80 Series Crossflow Stainless Steel -2.50 In / Out Same Side Out-Moderate/Aggressive Sound Flowmaster 80 Series Chambered Muffler
Manufacturer fitment & guides
Check 842580 against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y
