Speedmaster Intros Pontiac 389, 400, 455 Ram Air CNC Aluminum Cylinder Head

They Build Excitement

Speedmaster, manufacturer of innovative performance engine components, introduces the Pontiac 389, 400, 455 Ram Air 230cc 78cc Full CNC Aluminum Bore Cylinder Head in time for the 2023 SEMA Show. Positioned as one of the company’s paramount new products launched this year, this new cylinder head for the Pontiac 389, 400, and 455 engine exemplifies Speedmaster’s commitment to both innovation and superior craftsmanship.


Engineered on 5-axis CNC machines, to ensure the highest level of precision and enhanced airflow performance from the cylinder head’s Ram Air IV intake and exhaust port shapes to the natural finish that highlights top-tier construction.

Product Highlights Include:

• Precision Craftsmanship: CNC-machined combustion chamber, intake, and exhaust runners ensure unparalleled accuracy and performance.

• Robust Material Selection: Constructed from premium aluminum, offering a perfect balance between weight and strength.

• Advanced Port Design: The Ram Air IV intake and exhaust port shapes are engineered to optimize airflow and enhance engine performance.

• Comprehensive Specifications: From a combustion chamber volume of 78cc to a 14-degree valve angle, every detail has been finely tuned to meet the demands of modern-day automotive excellence.

While the cylinder head is sold bare, Speedmaster offers customization opportunities and provides essential guidelines such as reaming the valve guides to 11/32 inches to accommodate the recommended valves for optimal results.

The Speedmaster Pontiac 389, 400, 455 Ram Air CNC Aluminum cylinder head is available with an MSRP of $1,063.80.

Speedmaster CEO Jason Kencevski, says, “This new cylinder head embodies Speedmaster’s pursuit of bringing premium, yet accessible performance products to the automotive community. We look forward to a great reception when we introduce it at this year’s SEMA Show.”

For more information about Speedmaster’s Pontiac 389, 400, 455 Ram Air 230cc 78cc Full CNC Aluminium Bare Cylinder Head, visit Speedmaster at one of two locations at the 2023 SEMA Show. Speedmaster’s inside booth is located at #22753 in Racing and Performance located in Central Hall at the outside booth in the Silver Lot is #81020.


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(909) 605-1123


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Rialto, CA 92376

ABOUT Speedmaster®

Speedmaster has become a leader in its field, built on a long-term consistency of being a specialist in aftermarket automotive components. Founded in 1979 as Pete’s Performance, Speedmaster began building engines for customers as a hobby, and it has now grown to include selling, assembling, manufacturing high-performance engine parts. Over the years, the company has grown from a one-man brick-and-mortar business to a supply chain that entails more than 400+ people all across the world. Today, Pete’s Performance has evolved into the internationally known Speedmaster, which has distribution centers and offices in Sydney, Los Angeles, and Shanghai.