The 40 Series Original muffler that started it all! The 40 Series Muffler is an aggressive sounding street/strip muffler that delivers a powerful “Flowmaster Sound” you’ve heard so much about it. If you really want to hear your exhaust system and that great muscle car tone – from both inside and out of the vehicle.
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.
- No internal packing to blowout
- Excellent Street/Strip and Off Road application
- Aggressive Sound Exterior Exhaust Tone
- Durable fully welded 16 gauge aluminized steel