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It bridges the two without the airflow restriction you get from stock or mismatched parts
allowing tuners to tailor the power curve appropriately
lifting volumetric efficiency
the RPF1 is lightweight and incredibly strong
Easy step by step instructions
Spoon Sports Rigid Collar - Toyota Caldina ST215W - Full Kit 51325-TA0-A01 It bridges the two withoutDeveloped 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
