JAZ Products' Engine Block-Off Kits are designed for blocking off important ports and holes on your engine while in storage or in the middle of a rebuild, where the engine is open to outside contaminents like dirt, dust and/or critters. These engine block-off kits are made of durable plastic and include separate block off plates for exhaust, carburetor, fuel pump, distributor and water outlets. Available for popular small and big block Chevy and Ford.