Flowmaster 8042543 40 Series Muffler 409S – 2.50 Offset In / 2.50 Offset Out – Aggressive Sound

40 Series Stainless Steel – 2.50 Offset In / 2.50 Offset Out – Aggressive Sound; 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 409S stainless steel and fully MIG welded for maximum durability.;