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SpeedFactory Racing D-Series Upper Coolant Fill Necks are available in -16AN or 32mm (standard hose end) configurations
Printed on the front is our racing door tag
5-way limited-slip differential is the most common LSD upgrade option in performance and race cars
Note: Drilling to the body / bumper or resin product will be required when installing
Tomei Reinforced Main Bolt Set - EJ20 /EJ25 clearance50 SpeedFactory Racing D-Series Upper CoolantThe EJ engine cylinder block and crankshaft design is not really suited for high power use so the main bolts are important to maintain strength, Intake, the block. The stress that the block endures is susceptible to deformation of the crank main journals which can increase friction and ultimately bearing failure. The TOMEI main bolts are designed to suit high power applications to prevent the block from warping and to ensure rigidity.
