These brake rotor (disc) hats are designed to be used with OEM Porsche 993TT front rotors when converting a pre 1990 car to twin turbo "Big Red" calipers in the front. The deeper offset steel (bell shaped) hats from the OEM 993TT rotors are replaced with these aluminum versions, retaining the OEM hardware.

Sold as a PAIR (2 Hats)

We also have a more complete kit that includes brake adapters, hardware, hats, and brake lines. See here: https://www.rsrproducts.com/product-page/rebel-s-racing-996-boxter-s-to-911-front-caliper-adapter-kit