Exhaust Port Blockoff - 1-Piece - 1/4 in Thick - Plastic - Black - 23 Degree Head - Small Block Chevy - Pair

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SB Chevy Plastic Exhaust Block Off Plates, Standard 23 Degree

Allstar Performance exhaust block-off plates enable you to seal off exhaust ports when repairing or storing your engine. Machined from different thicknesses of aluminum, the plates will seal standard and spread port small block Chevy exhaust ports to protect against moisture, dust, and dirt.