Spoon Sports Rigid Collar - Subaru Impreza/WRX GVB, GVF - Front Pistons & Rods STI Chromoly Lightweight Flywheel –

STI Chromoly Lightweight Flywheel – ST123104S000

Competition bushings are injection moulded black Delrin

8497mm² against the stock airbox tube's 6487mm²

This is a performance enhancing induction kit for the 2015+ Subaru WRX STI 2

57DR is the popular model in the drift scene

Spoon Sports Rigid Collar - Subaru Impreza/WRX GVB, GVF - Front Pistons & Rods STI Chromoly Lightweight Flywheel –Developed 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