GiroDisc GiroDisc Porsche 911 GT3/GT3RS/GT2RS (991 Excl PCCB) Slotted Front Rotors
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GiroDisc Porsche 911 GT3/GT3RS/GT2RS (991 Excl PCCB) Slotted Front Rotors

GiroDisc
GIRA1-146
A1-146
Brake Rotors - 2 Piece
9 Units In Stock - Ships Next Business Day
$ 1,750.00
$ 1,750.00

SKU: A1-146

GiroDisc Porsche 911 GT3/GT3RS/GT2RS (991 Excl PCCB) Slotted Front Rotors

GiroDisc slotted front rotors deliver track-proven braking for Porsche 911 GT3 GT3RS GT2RS models in the 991 chassis excluding PCCB. This two-piece set features 380mm x 34mm rotors with curved vane design for rapid heat dissipation and reduced fade during extended sessions. Lighter than OEM by 9.6 lbs per pair they lower unsprung weight for sharper handling and quicker stops.

Key Features

  • Two-Piece Construction: 6061-T6 aluminum hat bonds to high-carbon steel ring minimizing rotational inertia while allowing ring replacement if damaged
  • Slotted Surface: 144 slots per rotor expel brake gases dust and pad residue preventing glazing and maintaining consistent bite under high heat
  • Curved Vane Geometry: Internal vanes direct cooling air for 20 percent better heat transfer than straight vane OEM rotors reducing thermal throttling
  • Precision Balancing: Rotors dynamically balanced to 0.05g eliminating vibration and ensuring smooth operation at speeds over 200 mph
  • OEM Bolt-On Fit: 5x130mm bolt pattern 78.5mm height matches factory hubs calipers and hardware for plug-and-play installation

Product Notes

  • Not compatible with vehicles equipped with Porsche Ceramic Composite Brakes (PCCB)
  • Pair with high-performance pads like GiroDisc GG or Pagid RS44 for optimal results
  • Ships as pair in protective packaging weighing 52 lbs

Installation Notes

  • Professional installation recommended.
  • Torque caliper bolts to 36 ft-lbs and hat bolts to 74 ft-lbs using thread locker
  • Compatible with OEM hardware no additional adapters required

This Part Fits

Year Make Model Submodel
2014-2016 Porsche 911 GT3
2016 Porsche 911 GT3 RS
2017-2019 Porsche 911 GT3
2018-2019 Porsche 911 GT3 RS
2017-2019 Porsche 911 GT2 RS

Why Choose GiroDisc?

  • Proven in GT3 Cup racing and Porsche Club events worldwide
  • USA-made with aircraft-grade materials for extreme durability
  • Engineered for 991 platform with CAD-scanned OEM data for perfect fit

Frequently Asked Questions

  • Q: Will these rotors fit my 991 GT3 with PCCB option?
    A: No these are designed for steel brake equipped 991 GT3 GT3RS GT2RS models PCCB cars require different hub and caliper specs
  • Q: What material is used in the rotor ring?
    A: High-carbon 48 steel alloy with 0.2 percent carbon content for crack resistance and heat tolerance up to 1000 degrees F
  • Q: What is the warranty and bedding procedure?
    A: One-year unlimited mileage warranty bed-in with 10 hard stops from 60-10 mph then 3 medium stops from 80 mph warranty claim requires proof of proper bedding

Shipping & Handling

  • Method: UPS Ground freight
  • Availability: In stock - ships same or next business day
  • Packaging: Oversized box 42 x 14 x 14 inches
  • Weight: 52 lbs

Request For Information

Have questions about GiroDisc Porsche 911 GT3/GT3RS/GT2RS (991 Excl PCCB) Slotted Front Rotors? Fill out the form below and we'll get back to you by the next business day.
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