GiroDisc GiroDisc 2018+ Subaru WRX STI Slotted Front Rings
Click to zoom in

GiroDisc 2018+ Subaru WRX STI Slotted Front Rings

GiroDisc
GIRD1-185
D1-185
Brake Rotors - Slotted
7 Units In Stock - Ships Next Business Day
$ 680.00
$ 680.00

SKU: D1-185

GiroDisc 2018-2021 Subaru WRX STI Slotted Front Rings

GiroDisc D1-185 slotted front rotor rings deliver track-proven braking for 2018-2021 Subaru WRX STI models. These 356mm x 30mm rings replace stock friction surfaces with slotted patterns that clear gases and debris while curved vanes pull heat away fast. Drivers gain consistent pedal feel shorter stopping distances and less fade during spirited driving or autocross.

Key Features

  • Slotted Friction Surface: Narrow slots enhance initial bite clear brake pad residue and expel hot gases for reliable performance lap after lap
  • Curved Vane Geometry: Internal vanes direct cooling air through the rotor increasing heat dissipation by up to 20% over OEM straight vane designs
  • High-Carbon Cast Iron: Resists cracking warping and corrosion even under extreme heat ensuring long service life
  • Lightweight Design: Each ring weighs 15.6 lbs for a pair total of 31.2 lbs shedding 10+ lbs versus stock rotors to sharpen handling response
  • Precision Fit: 356mm OD 30mm thickness matches OEM specs for bolt-on installation with GiroDisc aluminum hats

Product Notes

  • Requires GiroDisc two-piece rotor hats for assembly sold separately
  • Bed-in pads per GiroDisc guidelines for peak performance
  • Ships as pair in protective foam-lined box

Installation Notes

  • Professional installation recommended.
  • Torque hat-to-ring bolts to 20 ft-lbs using blue Loctite
  • Compatible with OEM calipers and GiroDisc hats only

This Part Fits

Year Make Model Submodel
2018-2021 Subaru WRX STI All

Why Choose GiroDisc?

  • Proven in endurance racing like NASA SCCA with thousands of track miles
  • Hand-finished in Italy from premium materials for exact tolerances
  • Patented retention system secures rings without rivets for easy replacement

Frequently Asked Questions

  • Q: Will D1-185 fit 2015-2017 Subaru WRX STI?
    A: No. Use D1-184 for 2015-2017 VA STI models. 2018+ has updated hub and caliper specs.
  • Q: What material are the rings made from?
    A: High-carbon ductile cast iron provides strength and heat resistance. Slots are machined after casting for precision.
  • Q: What is the warranty?
    A: 12-month manufacturer warranty against defects. Register product on GiroDisc site for coverage.

Shipping & Handling

  • Method: UPS Ground
  • Availability: In stock - ships same or next business day
  • Packaging: Pair in 18 x 18 x 6 inch box with foam inserts
  • Weight: 33 lbs shipping weight

Request For Information

Have questions about GiroDisc 2018+ Subaru WRX STI Slotted Front Rings? Fill out the form below and we'll get back to you by the next business day.
Brake Rotors

Brake Rotors

Brake rotors for street, track, tow, and off-road builds are stocked at Black Ops Auto Works. Shop drilled and slotted rotors, slotted-only rotors, dimpled rotors, blank OE-replacement rotors, two-piece floating rotors, high-carbon iron rotors, and vehicle-specific rotor packages for Hellcat, Trackhawk, TRX, HEMI, Coyote, LS, LT, and import platforms. Every product is filterable by year, make, model, trim, and factory brake package so the correct rotor ships the first time. Black Ops Auto Works carries 2,884 brake rotor SKUs across drilled, slotted, two-piece, and OE-replacement categories. What This Collection Covers Brake rotor selection is one of the two friction decisions on the vehicle, the other being pad compound. This collection covers rotor styles, metallurgy, sizing, and vehicle-specific fitment for daily drivers, sport cars, track builds, tow rigs, and off-road platforms. Rotor Styles Drilled and slotted, slotted-only, dimpled, blank OE-replacement, and two-piece floa...

View Brake Rotors Products
Brake Rotors - Slotted

Brake Rotors - Slotted

Slotted brake rotors for cars, trucks, SUVs, and performance builds are stocked at Black Ops Auto Works. Shop front and rear slotted rotors, single slotted and slot and drilled combination rotors, two piece floating rotors, replacement rotor rings, big brake kit rotors, OE spec slotted rotors, and matched rotor and pad sets for daily drivers, track cars, and tow vehicles from DBA, EBC, Alcon, GiroDisc, StopTech, PowerStop, and Black Ops Auto Works. Every rotor is filterable by year, make, model, trim, engine, and drivetrain so the correct diameter, thickness, bolt pattern, and hat height ships the first time. Black Ops Auto Works carries 707 slotted rotor SKUs across front, rear, two piece, and big brake kit replacement categories. What This Collection Covers Slotted rotors cut straight or curved channels across the face of the rotor to continuously shave a fresh layer of pad material and vent gas and debris away from the contact patch. The result is a more consistent pedal feel...

View Brake Rotors - Slotted Products
Brakes

Brakes

Brake parts and complete brake kits for cars, trucks, SUVs, Jeeps, and track builds are stocked at Black Ops Auto Works. Shop brake pads, brake rotors, big brake kits, brake calipers, caliper covers, stainless steel brake lines, brake master cylinders, brake hardware, brake drums, brake shoes, hand brakes, and brake adapters for HEMI, Hellcat, Trackhawk, TRX, LS, LT, Coyote, and EcoBoost platforms. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 14,180 brake SKUs across pads, rotors, big brake kits, calipers, and hydraulic categories. What This Category Covers Brakes are the highest-priority safety upgrade on any modified vehicle. Any horsepower, tire, or suspension change increases the demand placed on the braking system, and a correctly matched pad, rotor, line, and fluid package produces measurable improvements in stopping distance, pedal feel, and heat capacity. This collect...

View Brakes Products
GiroDisc

GiroDisc

GiroDisc parts and accessories for Porsche 911 and Cayman, BMW M2 M3 M4 M5, Nissan 350Z and GT-R, Corvette C8 and Z06, Camaro ZL1, Mustang Shelby, WRX STI, Viper, and other track-focused cars are stocked at Black Ops Auto Works. Shop floating two-piece brake rotors, slotted rotor assemblies, replacement rotor rings, aluminum hats, brake hardware, caliper rebuild kits, and track brake components for street cars, track cars, trucks, and focused performance builds. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 201 GiroDisc SKUs across fitment-specific product lines. What This GiroDisc Collection Covers GiroDisc is a premium brake brand focused on floating two-piece rotors, replacement rings, rotor hardware, and selected caliper service components. Their systems are engineered for repeated high-energy braking on performance street and track applications. Fitment Comes First Rotors...

View GiroDisc Products
Military & First Responder Discounts

Military & First Responder Discount Program

Black Ops Auto Works proudly honors active duty military, veterans, National Guard, reserves, police officers, firefighters, and EMTs with an exclusive 5% discount on all performance parts and carbon fiber upgrades. Verify instantly and start saving today.

Learn More & Apply

Your cart

×