Flowmaster · New
Flowmaster 01-04 GM 6.0L/8.1L Heavy Duty Truck 50 Series BB Muffler
MPN 530513 · Store SKU flo530513
Supplier stock checked 11/8/2026, 6:44:12 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 50 Series Big Block muffler is made for more than just big cubic inch engine applications. Its large case size with internal tuning chamber provides mileage and power gains along with maximum sound control for a quiet interior tone, even under heavy loads. Well suited to heavy duty vehicles such as full size trucks, SUV's, RVs, and tow vehicles. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability. 50 Big Block - 3.00 Dual In / 3.50 Offset Out - Mild Sound Flowmaster 50 Series Big Block Chambered Muffler
Manufacturer fitment & guides
Check 530513 against the manufacturer’s application information below.