When the goal is measurable power from a single upgrade, the top end kit is where it starts. Speedmaster's Big Block Chevy Top End Kit was designed to deliver a complete intake-to-exhaust solution, engineered as a matched system rather than a collection of individual parts.

What the Kit Includes

The Speedmaster BBC Top End Kit pairs aluminum cylinder heads with a matched intake manifold, designed to work together as a system. The port geometry, runner volume, and combustion chamber design are engineered to complement each other, which is what separates a kit from a parts list. Gaskets, bolts, and hardware are included so nothing is left to chance during installation.

Dyno-Tested Results

Richard Holdener, one of the most recognized names in engine testing, put the Speedmaster kit through its paces on the dyno. The results spoke clearly: over 100 horsepower gained from the top end swap alone. That kind of output from a bolt-on package reflects the engineering work that went into matching the components before they ever reached the customer.

Why a Matched System Matters

Mixing and matching heads, intakes, and gaskets from different sources introduces variables that erode performance. A matched top end kit eliminates that guesswork. The intake ports align precisely with the heads. The combustion chamber volume is calculated against the intended compression range. The result is an engine that performs as designed, not as hoped.

For Big Block Chevy builders looking to add real, verified horsepower with a single upgrade, the Speedmaster top end kit is engineered to deliver exactly that. No guesswork, no mismatched components, just measured output backed by dyno data.