Barr Marine Block Off Plates

Making big changes to a boat exhaust system will produce the desired results with block-off parts made by the industry’s leader in aftermarket engine exhaust parts. A block-off plate is used to seal engine openings when you remove part of an exhaust system or switch units (such as going from a through-hub to a through-transom). This prevents extra air and water from getting into the motor so boat captains can take advantage of their exhaust mods; they also produce a more accurate air-fuel ratio reading.

Barr Marine block-off plates are made in the U.S. from corrosion-resistant stainless steel for premium saltwater performance. With multiple shapes and sizes backed by a three-year limited warranty, you can be confident in a lasting fit. If you are doing an exhaust modification or need to replace busted plates, trust Barr Marine block plates to keep water out.

Protect Your Engine with Exhaust Block Offs

At Marine Parts Source, we have Barr Marine block-off plates for their aftermarket exhaust systems along with OEM-style plates for MerCruiser, Crusader and other leading engine brands. There are block plates to fit center-rise exhaust manifolds, closed-cooled engines, log-style engines and more. Some block-offs have a weep hole to let moisture drain from the holes, lowering the risk of rust and mold.

Select a block-off plate to see which Barr or OEM part numbers it will replace. We are an authorized Barr Marine dealer with access to other parts, so if you’re looking for a certain plate, call our knowledgeable representatives at 866-388-0390.