Heritage — EJ Engines & Internals

The EJ core of the Heritage line. Built engines, short blocks, and internals from the racing years — Ken Block Spec to the original S-series lineage.

Built in-house

Engines assembled at our East Coast facility. Parts designed, tested, and proven on our own cars — including the Gymkhana builds.

Support from the builders

Questions go to the people who made the part, not a call center. Contact us — a real person answers.

Backed in writing

Engines carry 1 year / 12,000 miles. AOS carries a limited lifetime warranty. Extended engine coverage is available.