Speedmaster Engine Intake Manifold

Speedmaster Intake Manifolds: Purpose-Built Performance Induction

When it comes to extracting every last bit of power from a performance engine, few components matter more than the intake manifold. Speedmaster has built a reputation among serious engine builders for offering a remarkably broad lineup of engine intake manifolds — spanning classic carbureted platforms to modern EFI systems — all constructed from aluminum and engineered to optimize airflow from idle to redline.

A Product Line for Every Build

Speedmaster organizes its intake manifold catalog into clearly defined performance tiers and styles, making it straightforward to match the right manifold to your application. On the carbureted side, the LowRise and MidRise dual-plane designs target street and street/strip use, with broad torque curves suitable from idle up through roughly 5,500 RPM. The iconic Holeshot LowRise manifold, for example, is a direct-fit dual-plane replacement for 1957–1995 Small Block Chevy non-EGR engines — and notably, these manifolds are cast from steel molds rather than sand molds, resulting in tighter dimensional consistency.

Moving up the performance ladder, Speedmaster's HiRise single-plane manifolds are tuned for an RPM range of 3,500–8,000 and are well-suited for racing and serious street performance. The Ford Small Block Windsor HiRise, for instance, features a rear water crossover passage, nitrous/injector bosses, and four corner water ports, with port dimensions deliberately oversized compared to many competing manifolds.

For the popular GM LS platform, Speedmaster offers an impressive array of fuel-injected options. The Hi-Ram EFI manifold (PCE148.1113) for LS1/LS2/LS6 engines is designed as a cost-effective alternative to fabricated sheet-metal for high-performance applications where hood clearance allows. The standard 102mm EFI manifold (1-148-014) is constructed from durable aluminum — a critical advantage over plastic OEM manifolds on forced-induction builds — and features an expanded plenum area to support increased airflow on LS1, LS2, and LS6 engines.

8-Stack EFI and Individual Throttle Body Systems

For builders who want show-stopping looks alongside serious performance, Speedmaster's Downdraft 8-Stack EFI intake systems deliver the classic look of vintage Weber induction with the precision of modern electronic fuel injection. The throttle bodies are CNC-machined from heat-treated 601 cast aluminum, with butterflies precision-machined to tight tolerances and secured to centerless ground brass shafts. These systems are available for GM LS1 and Ford Coyote platforms, and the linkage set features a single-screw adjustment for calibrating front-to-rear throttle shaft synchronization.

Broad Platform Coverage and Backed by Warranty

Speedmaster's intake manifold lineup covers an extensive range of engine families, including Chevy Small Block and Big Block, Ford Small Block Windsor, Ford FE and Cleveland, Mopar Small Block and Big Block, Pontiac V8, Oldsmobile V8, and even the Mazda Rotary 13B. Whether you are building a bracket racer, a street rod, a marine application, or a dedicated track car, there is a Speedmaster manifold engineered for the job. All manifolds are backed by a 12-Month Limited Worldwide Warranty, providing builders with added confidence in their investment.