Flirtin With Disaster Performance is revolutionizing the Duramax diesel performance market with the first-ever Billet Roller Rockers! The bolt-on kits will fit under 2001-2011 stock valve covers and with factory push tubes. They also add dependability, durability, ratio accuracy, better oiling, less friction, increased throttle response, more even valve opening and 20 percent lighter weight.
These Billet Roller Rockers have proved 15 to 61 rear wheel horsepower increase, up to 290 ft./lbs. of torque and improved fuel mileage up to 1.2 mpg.