The AFE 49-44031NM MACH Force XP 4" Downpipe-Back Race Exhaust for your 2011-2015 GM 6.6L Duramax LML is engineered to go give your truck the edge in competition! Built from durable T409 stainless steel, the AFE MACH Force XP Exhaust System will increase power and performance in your pickup. This face exhaust system features a 4" diameter for increased flow.
Features:
- 4" Stainless Steel Construction
- Mandrel Bent For Maximum Flow
- Off-Road Downpipe-Back Exhaust
2011-2015 GM 6.6L Duramax LML (ECLB, CCSB & CCLB Configurations Only - Does not fit ECSB)
Warning: This free-flow race exhaust system requires the use of an aftermarket performance programmer with off-road tuning.