PULLEY UPGRADE KIT12002 KK001 Features Additional installation of a small diameter pulley to Supercharger Kit Ver. 3, which is best match with 91 octane gasoline, upgrades the fuel parts with E85 and leads to +90% more power compared to the stock. HKS S C RON91: RON91 gasoline spec. 255HP (+80HP of the stock) HKS S C E85: E85 fuel +PULLEY UPGRADE KIT + Fuel Pump + Injector. 320HP (+150HP of the stock) Pulley Upgrade Kit, fuel pump, and injector are available
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