The PTBI side mounting brackets point inwards under the seat to save space, though in turn sometimes making the bracket to chassis mounting bolts slightly hard to access. These brackets are made from 6 mm thick high grade anodized aluminium and allow the seats to be tipped, raised and lowered. They are compatible with all versions of the B6 Screamer, the B6 with side mount option, the B7 and the B8. The can be run with STRI & PTRI sliders (regular width seats) or STRI / PTRO sliders (XL width seats), though it generally recommended to not user sliders in race car applications. Fixed mount to chassis is recommended.