LT4 377" Short Block

Mesa Balancing Racing Engines  will help you get the most out of your blower or turbo with this short block combo. Proven reliable at 1100hp to the ground, the factory forged LT crank attached to 4340 H-Beam rods and custom forged pistons will set your mind at ease and allow you to make the power with the boost you're craving.  Displacement: 377" Bore: 4.070" Proven Power Rating: 1400 RWHP Stroke: 3.620" Compression Ratio: 10.5:1 w/ 64cc Chamber Rod Length 6.125" Cylinder Head Compatibility: LT4, LT1 Oil System Type: Dry Sump Block: GM LT4 6.2L Aluminum Crankshaft: GM Forged LT4 w/ our Blueprinting Process Connecting Rods: Callies Ultra Billet H-Beam or Manley Carrillo or Go Racing  w/ARP Ultra 7/16" Bolts Pistons: Wiseco Forged CP, JE Mahle or Diamond (.300" material above top ring land) Wrist Pins: Tool Steel Heavy Wall .200" Ring Pack: NPR Stainless Top (for high heat applications) Napier Second, 3mm Oil Bearings: Clevite H Series Mains & Rods Main S