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The SpeedFactory Racing 4140 Head Stud Kit is great for most forced induction applications up to 800+HP and includes oversized forged nuts & washers for superior load distribution
Nuts and Bolts
Adjustment couldn’t be easier
offering all the perfroamnce of a track focussed coilover with the compliance of a raod setup
Airflow calculated with a 90mm neck filter all the way to the MAF
Spoon Sports Rigid Collar - Toyota Crown Majesta UZS186 - Full Kit Engine Mounts The SpeedFactory Racing 4140 HeadDeveloped 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
