Flowmaster Flow FX Cat-Back Exhaust System For 20-25 GM 2500HD/3500HD 6.6L Gas led off-road lighting & light bars You cannot properly flush your

You cannot properly flush your cooler lines without the aid of a hot flush machine that can get hot enough to open the bypass valve up

(2) FOX Performance Shocks

Our knuckles raise the tie rod 2 3/4 in

Precise MAF bung placement is the key to the PERRIN Intakes power

(3) 5 Quart Jugs of 15W40 Oil

Flowmaster Flow FX Cat-Back Exhaust System For 20-25 GM 2500HD/3500HD 6.6L Gas led off-road lighting & light bars You cannot properly flush yourThis 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