CNC Competition BB Chevy 555 Dart Short Block, Molnar Crank, Diamond 13.4:1 Nitrous 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.

BB Chevy 555 Short Block Assembly
NewMolnar 4340 forged steel crankshaft (4.250 Stroke) **Internal Balance**
New Molnar H-Beam connecting rods bushed fit pins with 7/16 ARP 2000 bolts (6.385 Length)
New Diamond forged 46cc nitrous dome pistons (4.560), Premium H-13 tool steel wrist pins
Total Seal AP Steel piston ring set
ACL/Clevite 77 Rod and Main Bearings
Dura bond cam bearings
Brass freeze plug kit
Dura bond finishing kit
New Dart Big M sportsman block, short deck
Compression Ratio with 112cc Heads: 14.6:1
Compression Ratio with 118cc Heads: 13.7:1
Compression Ratio with 124cc Heads: 12.9:1

*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. *Ships Truck Freight*