BBC FT Powerpak Piston Set 4.350 Bore -8.1cc

The MAHLE PISTONS BBC FT Powerpak Piston Set with 4.350 bore and -8.1cc compression volume is a forged piston kit engineered for serious Big Block Chevy engine builders and performance shops. This complete set delivers the precision geometry and material quality demanded by high-output applications where reliability and consistent ring sealing are non-negotiable. The -8.1cc dish design is purpose-built for specific compression ratios and fuel octane requirements, making bore size and compression volume critical specifications for dyno-verified power development.

The 4.350-inch bore specification accommodates larger displacement builds while the forged construction provides the strength needed for boosted or nitrous applications. Ring groove dimensions of 1.5 x 1.5 x 3.0 mm are optimized for the ring package typically paired with modern fuel injection and aggressive cam profiles. The -8.1cc compression cavity allows builders to dial in exact combustion chamber volume for their target compression ratio without relying solely on head chamber design. Weighing 13.99 lbs for the complete set, these pistons integrate directly into standard BBC block preparation without requiring custom machining for fitment.

This piston set is specified by engine builders preparing BBC engines for street performance, marine applications, and racing programs where controlled compression and proven metallurgy matter. Whether assembling a fuel-injected street engine, marine big-block platform, or bracket-racing combo, the Powerpak geometry and forging process deliver repeatable results. Builders working with 4.350-bore blocks and targeting 10.5:1 to 12:1 compression ratios will find the -8.1cc dish volume compatible with popular Big Block Chevy cylinder heads and cam combinations commonly available through performance suppliers.