Moroso Fuel Pump Block-Off Plate

Moroso Fuel Pump Block-Off Plates: Precision Finishing for Performance Builds

When a performance engine build moves away from a mechanical fuel pump — whether transitioning to electronic fuel injection, installing an electric fuel pump, or freeing up space for a racing vacuum pump — properly sealing the fuel pump mounting boss is a critical detail that demands the same quality as every other component on the engine. Moroso Performance Products, a name synonymous with race-proven engineering since 1968, brings that same commitment to their line of fuel pump block-off plates.

Moroso was founded in 1968 by Dick Moroso, one of the most successful modified production drag racers on record, who left his racing career to design, test, and manufacture specialized products aimed exclusively at racers' needs. That heritage translates directly into parts like these block-off plates: simple in concept, but executed with the material quality and fitment precision that builders and competitors rely on.

What Sets Moroso Block-Off Plates Apart

Moroso's fuel pump block-off plates are designed to seal the fuel pump mounting boss when a mechanical fuel pump is not used, and are available in two popular styles: anodized aluminum and high-luster triple chrome plated steel — each including a gasket. This means whether you're building a show-quality engine bay or a no-nonsense race motor, there's a finish option that fits the aesthetic.

For builders who need more utility from the fuel pump boss location, Moroso also offers a more advanced billet aluminum variant. This billet aluminum plate provides 1/8" N.P.T. and -12AN provisions for applications not using a fuel pump in stock location, making it useful for connecting a vacuum pump, vacuum gauge, or cylinder head drain-back. It includes a -12AN male fitting, a 1/8" N.P.T. pipe plug, gaskets, and stainless steel socket head screws.

The billet aluminum units are machined with the "Moroso" name on the exterior, adding a branded, finished look to the engine bay. Each unit comes with the necessary gasket and mounting hardware for correct installation, making it an ideal choice for those looking to eliminate their mechanical fuel pump or transition to EFI while retaining their factory timing cover.

Wide Engine Family Coverage

Moroso's fuel pump block-off plate lineup covers the most popular American V8 engine families. Options are available for Small Block Chevy, Big Block Chevy, 273–440 Chrysler, and all Ford engines except the 351C, 351M, and 400. These units are also designed to be compatible with a wide range of original and aftermarket front timing covers, offering versatility and convenience in installation for a variety of setups.

Built by Racers, for Racers

Moroso Performance Products is one of the world's most respected suppliers of automotive equipment for racing and street performance applications, manufacturing over 4,000 products ranging from oil pans and oiling systems to ignition wire, valve covers, fuel system equipment, and chassis components. Moroso Performance Products parts are made in the USA by skilled craftsmen at its state-of-the-art facility in Guilford, Connecticut. Even a detail-oriented component like a fuel pump block-off plate benefits from this manufacturing culture — consistent fitment, proper sealing, and finish quality that holds up in demanding racing environments.

Whether you're doing a clean EFI conversion, building a dedicated race engine, or simply tidying up a project that no longer uses a stock mechanical pump, Moroso's fuel pump block-off plates provide a reliable, polished solution that reflects the brand's decades of racing heritage.