Atomic 550 Rebuild Kit
The High-Performance Stepping Stone
The Atomic 550 Rebuild Kit is engineered for the serious enthusiast looking to push well beyond standard performance. Taking the guesswork out of parts matching, this comprehensive package bundles everything you need to build a rock-solid bottom end and valvetrain capable of reliably handling up to 1000hp.
Forged doesn't have to mean noisy. The 550 kit pairs our zero-failure Superleggera Billet Rods with ICON Forged Pistons. The ICON pistons feature a unique crown and skirt geometry that allows for tighter cold clearances. This means you get the 1000hp strength of a 2618 forged alloy without the aggressive "piston slap" rattle on cold start.
A Complete System
We don't just supply rods and pistons. The 550 Kit secures your rotating assembly with a 10mm Billet Main Girdle, guarantees oil pressure with a Full Steel Oil Pump, and locks down the cylinder head with 12mm Tool Steel studs and an MLS-D head gasket. It's the ultimate street/strip package.