About Services Gallery Contact Call (307) 235-6319
Mills, Wyoming · Since Establishment

Every Engine Deserves Precision Work

From performance builds to daily drivers, we machine, rebuild, and restore engines to factory-spec or beyond — with the kind of attention most shops skip.

Call Now Our Services
Engine machining work at Ace Hi-Performance Engines
About Us

Built on Craft,
Driven by Trust

Ace Hi-Performance Engines is a full-service automotive machine shop and repair facility right here in Mills, Wyoming. We specialize in engine rebuilding, precision machining, and performance work that holds up on the road — not just on the dyno.

Whether you're restoring a classic truck, prepping a race engine, or just trying to get your daily driver running right again, we treat every build with the same standard: measure twice, machine once, and never cut corners.

100%
Commitment
CNC
Precision
Local
& Trusted
What We Do

Expert Engine & Auto Repair Services

From rough idle to race-ready — we cover the full spectrum of engine performance and precision repair.

Engine Rebuilding

Complete engine teardown, inspection, and rebuild — from mild street replacements to high-performance builds. We source quality parts and machine everything to spec.

Precision Machining

Block deck resurfacing, cylinder boring, honing, valve job, and crank grinding. Every dimension checked and verified — because tolerances matter.

Performance Builds

Whether it's a crate engine swap, forced induction setup, or a full race motor — we plan it, machine it, and help you get it running right.

Diagnostic & Repair

Check engine lights, rough idle, loss of power — we diagnose the real problem, not just read codes. Honest assessments, no upselling, no surprises.

General Auto Repair

Beyond engines — brakes, suspension, cooling systems, and more. We're your neighborhood auto shop for everything that keeps you rolling safely.

Restoration Support

Bringing a classic back to life? We machine old blocks, recondition heads, and help you get period-correct performance that drives like new.

Why Choose Us

The Difference Is in the Details

We don't just fix engines — we understand them. Here's what sets us apart.

Quality First

Every job gets the full treatment — proper measurements, quality parts, and careful assembly. No shortcuts.

Local & Approachable

We're your neighbors in Mills. Bring your concerns, ask questions, and get straight answers — no jargon, no pressure.

Honest Assessments

We'll tell you what your vehicle actually needs — and what it doesn't. No unnecessary work, no inflated bills.

Performance Focused

From stock replacements to custom builds, we bring passion and precision to every engine we touch.

Get Started

Ready to Get Your Engine Running Right?

Give us a call or stop by the shop. We'll walk you through what your vehicle needs — honestly and clearly.

(307) 235-6319 Send a Message
Contact

Let's Talk About
Your Engine

Visit the Shop

Address 482 N 1st Ave, Mills, WY 82604
Phone (307) 235-6319
Email aceautomotivemachine@hotmail.com
Hours Monday – Friday: 8:00 AM – 5:00 PM

Send a Message

Tell us about your vehicle and what you need — we'll get back to you as soon as we can.

Message Sent!

Thanks for reaching out. We'll get back to you shortly.

Is this your business?This is my business