AP Racing by Essex 2-piece Competition J Hook Disc Pair (Front 350x34mm)- Porsche OEM 330mm replacement

AP Racing by Essex 2-piece Competition J Hook disc pair for front of Porsche models with an OEM 330mm disc: 13.78" x 1.4" (350mm x 34mm) 72 Vane, D66 radial depth Includes caliper relocation spacers Huge increase in airflow, cooling capacity, and durability vs. OEM Designed for: club racing, time trial, autocross, HPDE Works with OEM calipers, no modifications required Ultralight, fully floating, anodized billet aluminum hat with float control/anti-rattle clips Patented Disc Burnishing/Bedding Service Pair/$150 Two-piece Floating Design with Aluminum Hat As is the case with most metal, iron brake discs grow substantially when heated. As it is heated, a disc expands radially, increasing in diameter and circumference. One-piece disc designs run into problems when this occurs. Look at the picture below and imagine the disc is being heated on the track. As the disc expands, the outer edges of the disc are pulling away from the center of the disc, but there are no built-in provisions to