SEMA 2023 Speedmaster Introduces Pontiac 389, 400, 455 Ram Air CNC Aluminum Cylinder Heads

Official Release:

Speedmaster® Introduces Pontiac 389, 400, 455 Ram Air CNC Aluminum Cylinder HeadSoon to be introduced at the 2023 SEMA Show 

Rialto, CA (October 24, 2023) — 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.”

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