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Thumbnail Filmstrip of Boost Insert - 8.5" Top Insert for Standard Race Case Images
TBS Race Inserts are crafted from billet aluminum in an array of sizes. Meant to change when boost is activated, a smaller opening boosts quicker and a bigger opening produces more boost on the top end. A quick way to tune your blower at the track, these inserts are available only for the race series blowers.
7.5 inches- #2125
8.5 inches #2124
9.5 inches 2123
10.5 inches Big and Ugly and Carbon Hats # 2122
12.25 inches - Bug catcher , Birdcatcher, Buzzard # 2121