LS 427 Pro Short Block, 9.5:1 LS2K Diamond Pistons, Fits 15 Degree Heads

CNC-Motorsports LS Dart short blocks have 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.

Dart SHP LS Next Cast Iron Block (4.125 bore) accepts all factory parts

Splayed outer bolts on middle main bearing caps

Fully Skirted block, cylinders extended .375" at the bottom for better piston stability

6 heads bolts per cylinder

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

Callies Compstar H-Beam connecting rods bushed fit pins, ARP 2000 bolts (6.125 Length)

Diamond LS2K forged pistons, H-13 .250 wall wrist pins (*Fits all 15 degree LS Heads L92*)

Total Seal Steel Piston ring set, 1.5mm Steel top ring, 1.5mm Napier second ring, with 3.0mm oil rings for power adders

H series race rod and main Bearings

Performance coated cam bearings

Compression Ratio with 62cc head 10.0:1 (Turbo / Nitrous)

Compression Ratio with 70cc head 9.5:1 (Turbo / Nitrous )

Rated to support 1500 Horsepower with Xtreme duty rod upgrade and ARP main studs

Note: *Camshaft & timing chain not included**

*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.