A Piston is the moving component that is contained by your engine (cylinder) head. In some engines the piston acts as a valve by covering and uncovering ports. The benefit of a Performance Piston is they may be forged depending on the manufacturer you decide to go with. Forged Pistons provide a higher compression ratio inside of your engine, which in turn allows your engine to rev higher and create more power. Forged pistons also handle high heat much more efficiently then OE pistons. Not only do they handle high heat better, but also the combustion pressure. You can find Performance Pistons in several materials such as billet aluminum, or cast hypereutectic aluminum. Depending on the type of use you’re planning on for your 1978 Chevrolet K20 Suburban, will help you determine what type of piston is best for you. Sport Compact Warehouse is your premier source for Performance Pistons. Contact one of our experienced representatives today to help you make a more informative decision.