Banks 48777 Monster Sport 4" Exhaust for 2003-2004 Dodge Cummins 5.9L 48777

Part #: 48777 UPC: 801279487772
Now $459.00
Fast Free Ground Shipping
ADD TO CART ($459.00)

Installation Instructions

Banks Monster Exhaust 48777 Details

  • Fits 2003 and Early 2004 (305 Horsepower) Dodge Ram 5.9L Cummins Trucks
  • 4” Constant Diameter Cat-Back System
  • Mandrel-Bent Stainless Steel Construction
  • Lowers Exhaust Gas Temperatures
  • Improves Flow by up to 122%
  • Straight-Through Muffler
  • Exhaust Tip Not Included
  • 5 Year Manufacturer Warranty
  • Note: Only Fits if Your Truck's Factory Catalytic Converter is Still Intact

Looking for that Banks “Monster” performance with a modest price? Then Banks’ new Monster® Sport is the “cool cat-back” exhaust system you are looking for. That’s because the Banks’ Monster Sport Exhaust is meticulously designed & tested to deliver cooler exhaust gas temperatures. Cooler EGT equals power. This 4" rugged, heavy-duty 100% stainless steel Monster of an exhaust system helps eliminate backpressure. With air-flows up to 122% better than your Duramax’s stock exhaust, Banks Monster Sport exhaust system is streamlined with heavy-wall tubing and constant-diameter bends — increasing your truck’s airflow while improving fuel economy. 

shown with optional 5" tip


With a name like Monster you might think the Banks Monster Sport exhaust system obnoxiously over-powers in-cab conversations and music — not so. Unlike the noisy drone of many straight-through mufflers, this Monster’s muffler is extensively sound-tested and engineered with a unique expansion chamber and spun ceramic, a very high-temperature packing. The result? A rich, authoritative exhaust note that isn’t domineering — yet massively improves flow over the stock muffler! Now that’s a Monster!


This product can expose you to chemicals which are known to the State of California to cause cancer. For more information go to
California Proposition 65 Notice
Verify Fitment

Don't see your vehicle? Browse similar parts.
free shipping icon
FREE Shipping On all orders over $100
Secure shopping icon
Safe Shopping Payments 100% secure
phone icon
Have a question? 1-801-938-4891