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

20-0866-PK — Fuel Rail Plumbing Kit

turbo noise is restored and response is left at an all-time high

✓ Allows use of high-flow aftermarket injectors

Result was 115

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.