BB Pontiac PowerPak Piston Set 4.185 Bore

The BB Pontiac PowerPak Piston Set 4.185 Bore by MAHLE is designed for big-block Pontiac engine builders who require high-performance internals. This piston set is suitable for both enthusiasts and professional machine shops, offering the precision engineering necessary for street builds and engine overhauls.

Constructed from forged aluminum, these pistons feature precision-engineered ring grooves and skirt geometry. The 4.185-inch bore specification ensures a proper fit within your cylinder walls while maintaining critical piston-to-wall clearances that prevent scuffing and blowby. The PowerPak designation indicates optimized dome design and thermal properties that enhance combustion chamber efficiency.

This piston set is ideal for Pontiac owners undertaking engine rebuilds or restorations. Proper installation requires honing to match the 4.185-inch bore, correct ring gap setting, and precise connecting rod assembly by a qualified technician to ensure optimal performance.