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  Replaces Cummins part number 4935974 on cylinders 4 and 5
the Pro Series Differential Cover features a black powdercoated finish with machined fins for a distinct look
5in to 3in Transition Coupler available in black
Least restrictive air filter in its class
AFE 49-14001 Large Bore HD 4” Cat Back Exhaust System Chevrolet-Silverado-2500-6-6L-Duramax-LB7-2001 ¬† Replaces Cummins part numberThe AFE 49 14001 Large Bore HD 4 Cat Back Exhaust System for the 2001 2005 GM 6. 6L Duramax is engineered to perform in the most extreme environments. This system is constructed from mandrel bent 4" stainless steel tubing for maximum flow, increased horsepower, increased torque and lower EGT's. Large Bore HD exhaust systems are the perfect combination of performance, fit and value. Features: Cat Back Made in the USA 409 Stainless Steel Hassle Free
US$ 12.95
US$ 662.50