CNC Competition Dart LS 427 Short Block, Compstar Crank, JE 9.0:1 Pistons, LS7

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.

Compstar 4340 forged steel crankshaft (4.000 Stroke) **Internal Balance**

Compstar H-Beam connecting rods (6.125 Length)

JE forged -30cc dish pistons (4.125 Bore) (Assymetrical)

High performance plasma moly piston ring set

ACL/Clevite 77 Rod and Main Bearings

Dart LS Next Aluminum block

Compression Ratio:

70cc 9.0:1

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