Spool GM LS 5.7 and 6.0 Litre V8 4.000" Stroker Kit

GM LS 408 Stroker Kit - 5.7L & 6.0L

This GM/Holden LS 4.000-inch stroker rotating assembly includes the crankshaft, connecting rods and forged pistons required for common 5.7-litre and 6.0-litre LS stroker combinations. It is the primary Spool kit for customers searching for a 408 LS stroker kit or complete crank-and-rod rotating assembly.

For LS1, LS2 or LS3 builds where a crankshaft is not required and you instead need bearings and head gaskets with the piston-and-rod package, see the LS1/LS2/LS3 4.000-inch stroker rebuild kit.

This kit includes the following quality parts:

• Spool 4.000" Stroker Crankshaft - Crank Does Not Come With Reluctor Fitted
• Spool 6.125" H Beam Connecting Rods with ARP2000 7/16 bolts
• CP Bullet LS Pistons- SELECT FROM LIST BELOW
• Includes Pins, Rings and Locks

CP Bullet Series Pistons

Try our new LS Piston Finder to help select the right piston. Click here

Chevrolet LS 4.000" Stroke (15°Heads) with 6.125" Connecting Rods

Please note: All care is taken to provide the correct specifications; however Spool Imports is not responsible for any incorrect specifications listed. It is important to confirm your specifications with other available manufacturer resources before ordering any parts for an engine. If you need more information please contact [email protected]

CP Bullet Pistons Feature:

• Pistons manufactured from 2618 alloy for strength and durability
• Balanced to + or – 1 gram
• Dual forced pin oilers
• Contact reduction grooves
• Accumulator Grooves
• Contemporary ring set included (Comes standard with 1.5mm x 1.5mm x 3.0mm ring pack that consists of High-grade Steel Gas Nitrided barrel faced tops with Taper Hook Groove Napier second rings and a 3-piece soft nitrided rail flex vent oils, specially designed for severe duty applications such as nitrous blowers and turbo engines.)
• Forged side relief
• Chromoly wrist pins with wire locks
• FEA designed forging
• Tight tolerances
• USA made

Note: Clearancing of the cylinder block is sometimes required.

Piston selection: Match the measured block bore, stroke, 6.125-inch rod and actual cylinder-head geometry. Large-bore options require a suitable block and matching head-gasket bore. AFR/Brodix 12-degree options, where listed, require those specific heads. BLSR Race options use 1.2/1.2/3.0mm rings and carry the displayed upgrade charge; use the matching supplied ring set. Compression ratios are reference figures and depend on the complete engine combination.