Flowmaster FlowFX Cat-Back Exhaust For 14-19 Chevy/GMC 1500 4.3L 5.3L Classic 2000-2005 Ford Excursion 9 Cummins Valve Cover are

9 Cummins Valve Cover are more than just for looks

Universal Fuel sump

Raises boost without increasing turbine drive pressure

and ¼ mile

Flowmaster FlowFX Cat-Back Exhaust For 14-19 Chevy/GMC 1500 4.3L 5.3L Classic 2000-2005 Ford Excursion 9 Cummins Valve Cover areIntroducing Flowmaster's new line of FlowFX Cat back exhaust systems for the 2014 2019* (*Classic body) Chevrolet Silverado 1500 and GMC Sierra 1500 Crew Cab and Double Cab models with 4. 3L and 5. 3L engine. This FlowFX system is perfect for the person looking for a moderate to aggressive exterior and interior sound level with all of the performance benefits that you would expect from Flowmaster. Features include 409S stainless steel mandrel bent