Speedmaster Flexplate

Speedmaster: In-House Engineered Performance, Since 1979

Few names in the aftermarket performance world carry the weight of genuine, end-to-end manufacturing — but Speedmaster is one of them. Founded in 1979 as Pete's Performance, a small speed shop built on a passion for building engines, Speedmaster has grown from a one-man operation into a global powerhouse with distribution centers and offices in Rialto, California; Sydney, Australia; and Shanghai, China. What began as a hobby of building engines for customers has evolved into a vertically integrated brand that designs, engineers, and manufactures its own parts across three continents.

What truly sets Speedmaster apart from the crowded aftermarket field is its commitment to in-house production. Most aftermarket brands source parts and apply a label — Speedmaster designs, engineers, and manufactures in its own facilities. From concept through CAD, prototyping, and production tooling, the process stays entirely internal. That means every product in the catalog is built on engineering rationale, not sourcing convenience. Critical components carry SFI Foundation certification, and Speedmaster holds NHRA approval for crankshafts — a testament to how seriously the brand takes real-world performance validation.

Speedmaster's range covers the full spectrum of performance, from standard street replacement components all the way to parts that run in NHRA Top Fuel Dragsters. In 2026, Speedmaster entered a landmark multi-year partnership with John Force Racing as co-primary sponsor of Josh Hart's Top Fuel Dragster — and Hart won in the Speedmaster livery's very first race at the Gatornationals, setting a new track speed record at Gainesville Raceway. That kind of motorsport credibility isn't marketing; it's proof of what the parts can do.

At the core of Speedmaster's catalog are high-performance engine components. Their Engine Cylinder Heads are among the brand's most recognized products, offered in both bare and fully assembled configurations for a wide range of applications including Small Block Chevy, Ford Windsor, LS-based engines, and more. These aluminum heads are engineered to improve airflow and combustion efficiency straight out of the box.

For builders who want a complete solution, Speedmaster's Engine Top End Kits bundle cylinder heads, intake manifolds, valve covers, roller rockers, guide plates, and gaskets into one cohesive package — eliminating the guesswork of sourcing matched components separately. Paired with a broad lineup of Intake Manifolds and Engine Intake Manifolds, Speedmaster gives builders flexible options whether they are assembling a mild street engine or an all-out competition motor.

For those pursuing serious forced induction, Speedmaster's Supercharger Kits — including their co-developed USA-ProStreet™ 8-71 Billet Supercharger with John Force Racing — bring championship-grade blower technology to street and track applications alike. With nearly 4,000 products across engine and drivetrain categories, Speedmaster offers the depth and technical credibility that serious builders demand.

Why Choose Speedmaster?

• In-house design, engineering, and manufacturing — no relabeled sourced parts
• SFI Foundation-certified critical components and NHRA-approved crankshafts
• Covers applications from standard street replacement to Top Fuel Dragster competition
• Track-tested under the "Track Proven" badge — validated on road, track, and marine use
• Global distribution with over 400 team members across three continents
• 799,960 sq. ft. fully automated Rialto, CA distribution center for fast fulfillment