EngineQuest

About EngineQuest

Since 1987, EngineQuest has built a reputation as one of the most resourceful engine parts specialists in the industry. Headquartered in North Las Vegas, Nevada, this privately held company was founded on a straightforward but powerful premise: engine builders and remanufacturers should never have to walk away from a job simply because a critical part is no longer in production. For nearly four decades, EngineQuest has delivered on that promise by sourcing, engineering, and supplying unique, out-of-production, and hard-to-find engine components to professional shops and enthusiasts alike.

A Specialty Built on Solving Problems

What sets EngineQuest apart from mass-market parts suppliers is its focus on filling gaps in the market. Where other manufacturers stop, EngineQuest steps in. Their catalog spans a wide range of engine components — including engine timing covers, cylinder heads, rocker arms, harmonic balancers, manifolds, oil filter adaptors, cam eccentrics, head bolts, conversion parts, and forklift/industrial marine oil pans — making them a genuine one-stop resource for engine rebuilders working on both common and obscure applications.

One flagship example of EngineQuest's engineering philosophy is their EQ-CH364X Cylinder Head, designed to bridge the performance gap between the LS3 and LS7 platforms. With upgraded intake runners compatible with LS7 intakes, a 15-degree valve angle, a 1.7 rocker ratio, and 6-bolt block capability, it's engineered to grow with a build — from a near-stock street setup all the way to a full high-performance configuration — without requiring a new head. That kind of versatility is the hallmark of thoughtful, builder-focused engineering.

Cores, Recycling & the Full Ecosystem

Beyond new and remanufactured parts, EngineQuest has expanded its footprint through EQ Cores & Recycling, a division focused on supplying older engine cores and providing recycling services to auto wreckers across the western United States and Canada. This integrated approach means the EngineQuest ecosystem supports not just the build side of engine work, but the sourcing and sustainability side as well — a rare combination in the specialty parts world.

Who EngineQuest Serves

EngineQuest products are trusted by professional engine remanufacturers, machine shops, performance builders, and serious DIYers who need parts that simply aren't available elsewhere. Whether you're chasing down a hard-to-find timing cover for an older engine, upgrading to a performance cylinder head for an LS build, or replacing worn rocker arms on a high-mileage engine, EngineQuest brings engineering depth and inventory breadth to problems that other suppliers simply can't solve.