Proflow's LS3 OE Aluminium Engine Block

When building a mild performance engine, blocks from Proflow offer strength, accuracy and peace of mind that can't be assured in a rebuilt core. And, unlike so many of the used cores, nearly all of ours feature four-bolt main caps for extra strength. Each cylinder block is machined to production-spec tolerances and is manufactured to the exact specifications

Features

Cylinder Bore Diameter: 4.065"
Bore & Stroke: 4.075" Max Recommended
Cam Journal OD: Standard
Deck Height: 9.240".
Lifter Bores: Standard .843"
Main Bearing Size: 2.750"
Main Cap Bolts & Studs
Oil Pan: Standard
Rear Main Seal: Standard
Stud Holes Standard
Timing Chain/Gears: Standard