LS1 Crate Engine

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Chevy 383 CI Stroker LS1 Aluminum 440HP 450FT/LBS TQ Long Block Naturally Aspirated Block LS1 Aluminum Block One piece rear main seal 4 bolt main Premium core max .25mm bore.    Cylinder Heads 66cc Aluminum LS1 Heads Titanium Retainers Dual Valve Springs Hardened Locks 3 angle competition valve job   Valve Train Performance Hydraulic Roller Cam 225/229 580/590 114 High Performance Hydraulic Roller Lifters. Performance Roller Timing Chain 1.7 Ratio Roller Rocker Arms   Rotating Assembly Keith Black Forged Pistons  10:1 CR Forged Full Floating H beam Rods 4340 Forged Stroker Crankshaft Internally Balanced rotating assembly   (5.7 LS1 Core return required) Optional Upgrade (call to add to order) ARP Main Studs Installed $225 ARP Head Studs Upgrade $259 Aluminum Roller Rocker Upgrade $425 CNC Ported Heads stage 2 $1199(500HP 480TQ) Crate Engine Cost: $5,999

Promar Reserves the right to change manufacturers and specs without notice. HP and TQ ratings are based on actual results on a engine dyno with open headers in controlled environment tuned for maximum performance.