DART LS 441CI SHORT BLOCK

The ATK SP100 is a Dart SHP LS Next 441CI Short Block designed for custom builds requiring a large cubic inch short block for natural aspirated power. It features a Dart SHP LS Next Cast Iron block with a 4.125” bore and 4.125” stroke, resulting in 441 CID displacement. The crankshaft is a Scat 4340 forged unit with a 58 tooth reluctor wheel, complemented by Scat 4340 forged H-beam 6.125” rods with ARP 2000 bolts. The engine utilizes 2618 forged +22cc dished moly skirt coated pistons and steel top rings with Napier 2nd ring sets. Compression ratios vary from 10.1:1 with 66cc heads to 9.8:1 with 70cc heads. Camshaft bearings, freeze plugs, and oil galley plugs are installed and sealed.