The Jackson Racing Boost Upgrade gives your supercharged Miata a healthy shot of adrenaline! By spinning the supercharger faster, boost pressure is increased. The result is up to a 15-20% increase in horsepower and torque! All kits include boost crank pulley, high flow fuel pump and belt. 90-93 kits include additional fuel management electronics. A Jackson Racing Ignition TIming Controller (part# 999-490)must be used with this Boost Upgrade to avoid engine damage. 91-93 1.6 With PS no AC from VIN#209446
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