The Butler Process Starts Here…

There’s no denying Butler Performance is your go‑to source for Pontiac performance engines. What makes them special starts with the knowledge of our engine builders. They’ve been building engines for many years — and not just building them, but racing what they build. We’ve spent that time researching and developing technologies and processes that get maximum results, the kind many others try but can’t imitate.

Not every detail is laid out here — we have proprietary processes that only Butler uses to make our engines outperform the competition hands down. Combined with our building expertise and racing heritage, that’s what makes Butler your destination for Pontiac power. With that said, let’s walk through the in‑depth process your engine goes through to become a high‑performance Butler engine.

The Block

We start with the exact same blocks you’d build on your own. The difference is what we do to take an old, dirty core and turn it into the proper foundation for a custom Butler engine. It takes many critical steps:

Rotating Assemblies

The rotating assembly — crankshaft, connecting rods, pistons, and rings — is the heart of the engine. Butler doesn’t simply install or sell assemblies out of the box. Most suppliers and builders “box balance” using the manufacturer’s supplied weights.

We don’t take anyone else’s word on the parts we stand behind. Each assembly goes through a multi‑step inspection. We weigh and pin‑fit the rods and pistons as needed, then computer‑balance the crankshaft to the rest of the assembly so every part is matched into a true Butler‑worthy combination. All weights and details are documented on a balance card that ships with the assembly.

Cylinder Heads

Butler offers heads from today’s top manufacturers like Edelbrock and more — only names we trust to build high‑quality heads designed for your application. We provide these heads in the box, or we can fully customize them for your specific combination.

Like our rotating assemblies, we leave nothing to chance. Our custom heads go through an extensive multi‑step process to meet the Butler standard. We offer hand and CNC porting. Valve jobs are done on SERDI equipment for ultra‑high‑precision seating — the same class of equipment used in Formula One and top‑tier racing. Builds use high‑quality Ferrea valves, springs, locks, and retainers selected specifically for the camshaft in your engine. Each head is then flow‑tested on SuperFlow equipment, and all parts and work are documented, spec’d, and blueprinted on a build sheet supplied with the head.

Quality Parts

Every Butler engine is built with only the finest, highest‑quality parts in the industry. We partner with the best names in the business — and have many parts manufactured to our own strict specifications as Butler Performance Products (BPP):

Edelbrock Comp Cams ARP Lunati Callies Clevite Eagle Scat Ross Butler Performance Products

An engine is only as good as every part inside it. If one small part fails, you can be stranded, do damage, or lose the race — and our name and reputation ride on every build. That’s why we partner only with companies that produce the world’s best parts. These aren’t just your engine’s components; they’re the same parts we run in our own cars and race with.

Butler Performance Services

Need us to go the extra mile and build the engine of your dreams? Our custom engine shop does exactly that. Our professional builders work day and night to build Butler‑quality, tested engines for street cars, classic restorations, muscle cars, and race cars. Every engine moves through each step of the Butler Process, then gets dyno‑tested to confirm the numbers are exactly as expected. Finished engines are cleaned, crated, and ready for delivery anywhere in the world.