FG-FGX 5.0 BOOST PULLEY UPGRADE
FG-FGX 5.0 Miami supercharged engine bolt on hi boost pulley kit.
The kit includes a new replacement over driven SFI approved harmonic balancer assembly, smaller blower pulley and Eaton hub assembly.
This kit retains the factory supercharger drive belt.
With the fitment of these pulleys, you will see approx 11 to 12 psi of boost with a custom tune.
NOT RECOMMEND ON A NON-INTERCOOLED ENGINE.