SuSubaru OEM Small Idler Pulley WRX 03-14 / STI 04-21 | 13073AA230 Wheel Bolt Pattern_5x108 These egulators are direct bolt-on

These egulators are direct bolt-on for engines with the factory fuel rail or aftermarket fuel rails designed with mounting provisions for the stock regulator

Programmable low fuel pressure warning for engine protection

This cap is only confirmed to fit Koyo radiators

progressive rate coil springs

this is exactly what you need

SuSubaru OEM Small Idler Pulley WRX 03-14 / STI 04-21 | 13073AA230 Wheel Bolt Pattern_5x108 These egulators are direct bolt-onProduct Fitment: 2003 2014 WRX 2004 2021 STI 13073AA230 IDLER Complete Belt is Part Code 13073*C in the diagram Warranty Disclaimer: Subaru of America will only warranty parts installed by a CERTIFIED Subaru Dealership. The part being installed must also match the vehicle VIN. IE If you install an STi block in a WRX at your friends shop, do not expect a warranty claim to come through if it explodes! Please use your best judgement.