All Billet booster inserts available in blank, 8, 12 or 16 hole configurations just add number of holes to back of part number. Please call for custom configurations.

BLP Billet Annular Booster Centers
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BILLET ANNULAR BOOSTER CENTER .500 ID
BLP BILLET ANNULAR BOOSTER .500 I.D. booster center. All Billet booster inserts available in blank, 8, 12 or 16 hole configurations. Colors codes...$8.99... more info -
BILLET ANNULAR BOOSTER CENTER .600 ID
BLP BILLET ANNULAR BOOSTER .600 I.D. booster center. All Billet booster inserts available in blank, 8, 12 or 16 hole configurations. Colors codes...$8.99... more info -
BILLET ANNULAR BOOSTER CENTER .500 ID ALKY
BLP BILLET ANNULAR BOOSTER .500 I.D. booster center, alky fuel channel. All Billet booster inserts available in blank, 8, 12 or 16 hole...$7.88... more info