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with great results including race wins and overall championships
while holding laminar flow to the turbo tube
That's K20A2
This is the same knob as the aluminium version
Spoon Sports Rigid Collar - Toyota Progressive JGC15 - Full Kit Specom Beta Type with great results including raceDeveloped 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
