| Due to the tight spoke clearance on OE wheel this kit will not fit and requires a 17" wheel.
This is for a previous purchase of a stock sized WRX rotor, and you would like to upgrade to 4-piston calipers. This upgrade is good for the following part numbers:
9004 (One-piece stock replacement)
2042 (Two-piece stock replacement)
With the purchase of 2, this kit comes with:
- (2) 4-piston aluminum calipers (RB4045)
- (2) Aluminum adapters (AD101)
- (1) Set of RB ET300 brake pads (PD647-33)
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