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Pontiac V8 389 Pistons Early or Late — 389 Pistons for Pontiac V8s The 389 is the engine that built Pontiac's reputation, and it is the one displacement where the piston question...More Details »

Pontiac V8 400 Pistons Bore, Stroke and Compression — 400 Pistons for Pontiac V8s 400 Pistons decide the two numbers that matter most on a Pontiac 400 build: your finished bore and...More Details »

Pontiac V8 421 Pistons Big Journal, Small Bore — 421 Pistons for Pontiac V8s 421 Pistons are their own problem. The 421 uses the big 3.25" main journal block but a smaller standard...More Details »

Pontiac V8 428 Pistons Stock Stroke and Stroker — 428 Pistons for Pontiac V8s 428 Pistons share a bore family with the 400 but not a stroke. The 428 came with a 4.000" stroke crank,...More Details »

Pontiac V8 455 Pistons Where the Cubic Inches Get Paid For — 455 Pistons for Pontiac V8s The 455 is the biggest factory Pontiac V8, and the piston is what decides whether it comes...More Details »

Pontiac V8 Aftermarket Block Built To The Block — Aftermarket Block for Pontiac V8s Aftermarket Block pistons are a different conversation than a factory Pontiac rebuild. An IA II...More Details »

Pontiac V8 Pins Small Part, Big Load — Pins for Pontiac V8s Wrist pins are the smallest part in the rotating assembly and one of the first to complain when cylinder pressure climbs....More Details »