CNC Competition GM LS3 6.2L 415 Short Block, Eagle Crank, Mahle 10.2:1 Pistons

CNC-Motorsports, has quickly raised the bar to a new level in offering high quality short blocks at an affordable price. Our short blocks have become a huge hit among racers and performance enthusiast all over the world. We have the ability to custom build you just about any combination the way you want it. All our short blocks are 100% machined, CNC Machined and blue-printed to our race wining specs. We never cut corners like others just to lessen the price.

GM LS3 Short Block Assemble

New Eagle 4340 forged steel crankshaft (4.000 Stroke) **Internal Balance**

New Eagle H-Beam connecting rods bushed fit pins, ARP 8740 bolts (6.125 Length)

New Mahle forged -14cc dish pistons, 2618 forged Alloy, fits LS1 / LS3 15 degree heads

High performance plasma moly piston ring set

ACL/Clevite 77 Rod and Main Bearings

Clevite 77 cam bearings

Comp Cams freeze plug kit

New GM Aluminum block

Compression Ratio with 64cc Heads: 10.8:1

Compression Ratio with 70cc Heads: 10.2:1

*Professionally Machined, Balanced, Assembled and blue printed in house by CNC-Motorsports. Balance card and blue print sheet will be provided to the customer. All short blocks are standard bore unless otherwise noted. We can custom build any short block assembly to meet your needs.