Paragon 2-piece Rotors Front Pair 326mm x 30mm (12.83" x 1.18") - Subaru WRX STI 4-pot calipers (GDB / GRF / GVF / VAB)
Paragon 2-piece Rotors Front Pair 326mm x 30mm (12.83" x 1.18") - Subaru WRX STI 4-pot calipers (GDB / GRF / GVF / VAB) - Mil-Spec Black Hard Coat Anodizing:https is backordered and will ship as soon as it is back in stock.
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Paragon 326x30mm front two-piece brake rotors for Subaru WRX STI GDB / GRF / GVF / VAB with four-piston Brembo calipers. Supplied as a pair of complete rotor assemblies for the stated brake application.
Choosing the correct brake application
This STI pair is designed around the OEM four-piston Brembo front brakes and 326x30mm discs. The original listing supports the stated 5x100 and 5x114.3 applications, but wheel bolt pattern alone does not confirm brake compatibility. It is a different assembly from the later six-piston 340mm version.
Rotor specifications and fitment
| Vehicle / brake application | Subaru WRX STI GDB / GRF / GVF / VAB with four-piston Brembo calipers |
|---|---|
| Axle | Front |
| Diameter × new thickness | 326x30mm |
| Sales unit / included parts | Two complete rotor assemblies (one pair) |
| Construction | Floating two-piece |
| Rotor-to-hat attachment | Long D-Bobbin, 10 bolts |
| Friction ring | CM-250 high-carbon alloy cast iron |
| Hat material | 6061-T6 aluminum |
| Disc surface / ventilation | Slotted face; directional ventilation |
| Manufacturer assembly references | P2R.042.326.300.18000.08.03.01.F / P2R.042.326.300.18000.08.03.02.F |
Construction and service considerations
The floating attachment allows relative movement between the iron friction ring and aluminum hat as the disc heats. A later ring replacement must match the complete assembly reference and attachment system, not diameter alone.
Choose only the hat finish shown in the product selector. See the Paragon general rotor installation and bedding guide (PDF). Check pad compatibility, mounting surfaces and wheel clearance for the installed brake package.
Product FAQs
Which STI calipers identify the correct 326mm front rotors?
Use the factory four-piston Brembo application specified here. A six-piston STI setup requires its own 340x30mm rotor listing, even when the vehicle chassis appears in both product families.
Is this 326x30mm front product a complete rotor pair or bare rings?
It supplies two complete rotor assemblies with hats. Bare replacement friction rings are a separate product; match their dimensions and attachment details before rebuilding existing assemblies.
Pit Garage is an automotive service and performance parts shop in the Los Angeles area. Contact Pit Garage with your chassis, axle and installed brake package for selection help, or browse Paragon brake products.