Spoon Sports Rigid Collar - Nissan Skyline 400R RV37 - Full Kit GruppeM Eventuri builds it from high-grade

Eventuri builds it from high-grade prepreg carbon fiber and Kevlar for strength and a clean finish

delivering approximately 10% improved fuel efficiency at cruising speeds

the RCM340 offers superior flow throughout a wide pressure range

to suit V6 - V10 Impreza

Spoon Sports Rigid Collar - Nissan Skyline 400R RV37 - Full Kit GruppeM Eventuri builds it from high-gradeDeveloped 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