Allstar Performance Exhaust Block Off Plates - GM LS-Series Engines 20-OTL-NB-4XL Countersunk Washers 1/4" x 3/4"

Countersunk Washers 1/4" x 3/4"

but all auto racing safety gear is "fire retardant"

Smallest shell

standard static flow design

Frame drilling required for installation with a frame-side mounted hitch

Allstar Performance Exhaust Block Off Plates - GM LS-Series Engines 20-OTL-NB-4XL Countersunk Washers 1/4" x 3/4"Aluminum block off plates seal exhaust ports during engine storage or repairs. Plates help protect against moisture, dust, and dirt. Specialty items for the Shop, Trailer and Track. The Allstar Performance brand offers thousands of hard to find, specialty items that cover many segments in the performance aftermarket. For over 30 years, customers worldwide have come to rely on the quality, affordable and practical items available from Allstar