Properly firing your engine's ignition is a necessity for good combustion-thus power. There are many aftermarket ignition choices for the RB Wedge and Hemi that offer added voltage to the spark plugs.

I own a '71 Plymouth Satellite powered by a 402 Magnum crate engine. The car was running great until last fall. At higher rpm under full throttle, the engine begins to pop and backfire out the exhaust ...