Engine tests performed with same stock, used, running dual-port 1600cc engine with stock exhaust and stock 34PICT carburetor, then after installation of dual Kaddie Shack carburetors with EMPI single Quiet Pack Exhaust, then again after installation of dual Kadron carburetors with Quiet Pack and 1.4:1 ratio rockers. 

 Best Horsepower Gain: 20HP @ 5000 RPM
Best Horsepower Percentage Gain: 50% @ 5000 RPM
Peak-to-Peak Horsepower Gain: 13HP
Peak-to-Peak Horsepower Percentage Gain: 26%