Flowmaster 42441 40 Series Muffler – 2.25 Offset In / 2.25 Center Out – Aggressive Sound

40 Series – 2.25 Offset In / 2.25 Center 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 aluminized steel and fully MIG welded for maximum durability.;