Mahle Piston Kit, GM 604 Crate Engine Drop in forged. Replacement rings are not included. 101.651mm

If you're working on a GM 604 Crate Engine, this Mahle Piston Kit is designed as a direct drop-in replacement. These pistons are forged, meaning they're built from a solid block of aluminum that's heated and hammered into shape. This process creates a much stronger and more durable piston than cast ones, which is important for the demands of a crate engine. This kit is specifically for the Chevrolet Small Block 350 cubic inch engine, using a 4.002 inch bore size.

The pistons in this kit feature a press-fit pin design, which is a common and reliable method for connecting the piston to the connecting rod. They have a -4.9cc dish volume, contributing to a 10.3:1 compression ratio when paired with the correct components like a 3.480 inch stroke crankshaft and a 5.700 inch connecting rod. Each piston weighs 549 grams, helping to keep rotating assembly balance consistent. It's important to note that replacement rings are not included with this kit, so you'll need to source those separately to complete your engine build.

This Mahle piston kit is a well-built option for rebuilding or refreshing your GM 604 Crate Engine. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.