Girodisc Cadillac CT4-V Blackwing Rear Replacement Rings RB26DETT One-way check valve prevents boost

One-way check valve prevents boost pressure from entering crankcase

IE's own in-house developed POWERlink cable gives you the control to unlock your engine’s true potential from your own garage or driveway

High-gloss finish enhances engine bay appearance

The Girodisc front rotors weigh 19

at 400mm flow length x 205mm stack height x 120mm thick

Girodisc Cadillac CT4-V Blackwing Rear Replacement Rings RB26DETT One-way check valve prevents boostOur replacement rings are sold in pairs and include replacement hardware. The only parts you will reuse are your existing GiroDisc hats. Please note that unless specifically noted, GiroDisc replacement rings are only designed to work with GiroDisc hats. They are not designed to be used with other brands, including hats from cars equipped with 2 piece rotors from the factory.