Spoon Sports Rigid Collar - Subaru BRZ ZC6 - Full Kit HKS It fits standard back box

It fits standard back box and down pipe assemblies

Forced Pin Oiling

The RC-4 has 15 spokes

What many people don't consider is that since aluminum is such a fantastic thermal conductor (hence why it is used in radiators)

Spoon Sports Rigid Collar - Subaru BRZ ZC6 - Full Kit HKS It fits standard back boxDeveloped by Spoon Sports, the Japanese Honda tuning specialists, Rigid Collars are precision machined aluminium rings that lock your subframe to the chassis. Factories drill the subframe bolt holes oversized so components drop in fast on the production line, and that clearance stays for the life of the car. It leaves the subframe sitting a fraction off centre, dulling steering response and letting vibration through the floor. Fit a set and the bolts