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with a higher crown surface volume ratio to increase torque at low and mid-range speeds
distortion of the cylinder and cylinder head
A must-have for anyone taking their car on track
our 75mm throttle body delivers the airflow
340LPH (90 gph) at 73 PSI
Spoon Sports Rigid Collar - Mazda AZ Wagon MJ21S, MJ22S, MJ23S - Full Kit Torque GT with a higher crown surfaceDeveloped 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
