Flowmaster · New
Flowmaster 2.50 IN(D)/OUT(D) 40 Series Muffler
MPN 425404 · Store SKU flo425404
Supplier stock checked 11/8/2026, 5:19:40 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
The Original 40 series muffler delivers an aggressive exterior and interior tone. If you're looking for that original Flowmaster sound this is the muffler is for you. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability. 40 Series - 2.50" IN(D)/OUT(D) - Aggressive Sound Flowmaster 40 Series Chambered Muffler
Manufacturer fitment & guides
Check 425404 against the manufacturer’s application information below.