Flow Fx Cat-Back Exhaust System Fits 2020-2025 GM 2500Hd/3500Hd 6.6-Liter Gas, Cat-Back, Dual Side Exit, Stainless Steel Exhaust System Flowmaster HLN0C~ and anything in between

and anything in between

2nd option is preload spacer and top plate shim (highest setting)

Kit include two (2) harnesses to be able to plug one (1) pair of lights into the factory wiring

Cast aluminum end tanks with internal baffling and a robust bar/plate aluminum core for maximum heat transfer render a 130% increase in frontal surface area and a massive 83% increase in volume over the factory B9 SQ5 intercooler

Solid Brass Precision Movement

Flow Fx Cat-Back Exhaust System Fits 2020-2025 GM 2500Hd/3500Hd 6.6-Liter Gas, Cat-Back, Dual Side Exit, Stainless Steel Exhaust System Flowmaster HLN0C~ and anything in betweenThis Flowmaster Flow FX cat back exhaust system for the 2020 2025 GM 2500HD 3500HD trucks with the 6. 6 liter gas engine is manufactured using durable 409 stainless steel throughout and features 3. 50 to dual 3. 00 inch mandrel bent pipes for better exhaust gas flow, and a Flow FX straight through muffler is used for a moderate sound level and maximum performance. Maximum increases on the dyno revealed +9 hp and +10 lb ft at the rear wheels. This