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SpeedFactory Racing D-Series Upper Coolant Fill Necks are compatible with most aftermarket radiator setups
By reducing harmful torsional vibrations
25 thread pitch fits many popular applications for Honda K20/K20 and other engines
The TOMEI ladders also aid further in increased block rigidness to help support the crank cab bolts and maintaining the reliability of the bearings for longer engine life and increased durability for constant high end performance use
reduce fluid loss
Spoon Sports Rigid Collar - Mazda CX-7 ER3P - Full Kit Nismo SpeedFactory Racing D-Series Upper CoolantDeveloped 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
