Mr. Gasket Fuel Pump Block-Off Plate

Mr. Gasket Fuel Pump Block-Off Plates: Clean Conversions, Built for Racers

When you swap out a mechanical fuel pump for a modern electric unit, the vacated mounting hole in your engine block can't simply be left open. Fuel pump block-off plates seal that opening cleanly and permanently, keeping oil inside the engine and contaminants out. Few brands have more credibility in this space than Mr. Gasket — a company whose entire identity is built around sealing things right, the first time.

A Legacy Rooted in Racing

Mr. Gasket has been a fixture in the performance aftermarket since the 1960s, when drag racer Joe Hrudka used his own '57 Chevy as a rolling test bed to develop sealing solutions that could handle the punishing temperatures and pressures of competition engines. That racing-first philosophy has shaped every product the brand has made since — including their fuel pump block-off plates, which are engineered with the same commitment to precision fit and leak-free reliability.

What Makes Mr. Gasket Block-Off Plates Stand Out

Mr. Gasket offers fuel pump block-off plates in a small lineup of focused part numbers — each tailored to specific engine families. Key features across the lineup include:

• Precision-cut construction — plates are machined to closely match the contour of the stock fuel pump opening, ensuring a flush, gap-free fit against the block.
• Chrome-plated steel finish — the most popular options feature highly polished, chrome-plated steel that adds a clean, classic look under the hood while resisting corrosion.
• Polished aluminum availability — select applications are also offered in polished aluminum for builders who prefer a lighter, modern aesthetic.
• Gasket included — every block-off plate ships with a pre-cut gasket, so you have everything needed for a leak-free seal right out of the box, without hunting for a separate gasket.
• Broad engine compatibility — Mr. Gasket's block-off plates are designed to cover small block Chevy applications as well as big block Chevrolet 396/427/454 engines and most V6 and V8 engines with standard 1-3/4 inch bolt spacing.

Who Needs a Fuel Pump Block-Off Plate?

Any builder converting from a mechanical fuel pump to an electric fuel pump setup — whether for a carburetor conversion, EFI swap, or a cleaner engine bay build — needs to address the open mounting boss left behind on the block. Without a proper block-off plate, that cavity can leak oil, allow contamination to enter the engine, or simply look unfinished. Mr. Gasket's plates resolve all of that with a straightforward, bolt-on solution.

The chrome finish also makes these plates a popular choice for show-quality builds, where underhood presentation matters as much as function. Whether you're building a weekend cruiser or a dedicated drag car, Mr. Gasket's block-off plates deliver the same trusted seal that has made the brand synonymous with performance-grade sealing since the earliest days of the muscle car era.

Browse the full selection of Mr. Gasket fuel pump block-off plates, explore everything Mr. Gasket offers for your build, or shop the complete range of fuel pump block-off plates from all top brands.