NOT JUST FOR NITROUS RACERS!
Induction Solutions’ new Black Pressure Relief Plate billet spacers, featuring pressure relief technology, have two functions in a single spacer. You get the power increases of a one-inch thick open spacer and the benefit of the I-S Pressure Relief Plates on all four sides. The Pressure Relief Plate helps relieve pressure suffered during start-up backfire or a nitrous-style backfire.
The Pressure Relief Plate features four spring-loaded panels that are sealed with an O-ring for the best in performance and pressure relief. The panel returns to its original position following a backfire event. There are NO disks to be replaced, NO spare rings required, and NO special tools needed.
The inside diameter of the 4500-spacer is 5″ x 5″ (radiused edge to 5.125 can be made to work with most carbs up to 2.500 bore.)
The inside diameter of the 4150-spacer is 3.625″ x 3.625″