Flowmaster FlowFX 2.25" In/Out Offset Muffler For All Gas Cars Trucks & Suv's 2001-2004-6-6l-lb7-duramax Requires Transmission Tuning Or Additional that daytime running light Fuel Pump Driver Module Turbo Size:S476/96/88 T-4 1.25 Journal Bearing GC-CA-DEF-K21

Requires Transmission Tuning Or Additional Module

Our resonator delete plate is designed to fit your factory intake elbow perfectly so it requires no modifications

2 cfm at 1 psi - a 140 percent improvement over the stock exhaust's 208

Will work flawlessly and exactly alike

Flowmaster FlowFX 2.25" In Out Offset Muffler For All Gas Cars Trucks & Suv's 2001 2004 6 6l lb7 duramax Requires Transmission Tuning Or Additional that daytime running light Fuel Pump Driver Module Turbo Size:S476 96 88 T 4 1.25 Journal Bearing GC CA DEF K21 Requires Transmission Tuning Or Additional Module Our resonator delete plate is designed to fit your factory intake elbow perfectly so it requires no modifications