Flowmaster Flow FX Cat-Back Exhaust System For 20-25 GM 2500HD/3500HD 6.6L Gas shifters 1977-1979 Pontiac Phoenix

1977-1979 Pontiac Phoenix

Backed by Borla’s Million-Mile Warranty for reliability

sport-inspired tone

(1) Radius Arm Drop Bracket Set

3L Powerstroke 6-Speed

Flowmaster Flow FX Cat-Back Exhaust System For 20-25 GM 2500HD/3500HD 6.6L Gas shifters 1977-1979 Pontiac PhoenixThis 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