Gibson Cat-Back Single Exhaust System - 4 in Tailpipe - 5 in Tips - GM Fullsize Truck 2001-07 RU001003L wire the power and grounds

wire the power and grounds and you are ready to take complete control of your LS engineHolley is quickly becoming The New Standard In EFI

Increased Horsepower

1978-1991 Oldsmobile Cutlass Calais

and turn signal switch

175-400 lb/in Spring Rate

Gibson Cat-Back Single Exhaust System - 4 in Tailpipe - 5 in Tips - GM Fullsize Truck 2001-07 RU001003L wire the power and groundsGibson Single Side Exhaust is perfect for improved acceleration, maximum hill climbing, towing and passing power. This is our best performing Exhaust System. Exits behind the rear tire. Quieter in the cab than any other Performance Exhaust. Dyno test results show it makes maximum torque and horsepower at low end (1800 to 3000 RPM). Horsepower gains average 10 15 and 15 20lb ft of increase torque. Hassle free, bolt on installation with professional