fmm_logo
*FREE GROUND SHIPPING on items $25 or more!
*Free ground shipping for orders shipped to continental United States Only

707-544-4761

Shop by Vehicle



 

 
 

FLOWMASTER 50 SERIES BIG BLOCK MUFFLERS

Our largest and quietest muffler, the 50 Series Big Block Mufflers is made for tow vehicles, full-size trucks, large SUV’s and RV’s/Motor homes. More than just compatible with big cubic inch engine application, the 50 Series Big Block incorporates a very large Resonance Tuning Chamber to almost completely reduce interior sound in large cab vehicle and enough case volume to handle engines under heavy loads – perfect for tow vehicle. Significant improvements in mileage, torque, and horsepower are to be expected from this muffler, as well as decreased engine heat and wear.

  • The quietest Flowmaster we make!
  • Available in 16-gauge aluminized steel
  • Fully MIG-welded for maximum warranty
  • Greatly reduces interior sound and resonance

 

 

 

 

50 Series Big Block Mufflers

IN/OUT C/C O/C C/O O/O O/O SAME SIDE
3.50" 53550 53551 --- 53553 ---
IN/OUT D/C C/D D/D O/D
2.75"/2.50" --- --- 527504 ---
3.00"/2.50" --- --- 530504 ---
3.00"/3.50" 530513 --- --- ---