Tapered Piston Ring Compressor Cooling System Components_Radiators This means the modification is

This means the modification is completely reversible and necessary when the time comes to sell your car

R33 and R34 models from 1989-2002 with the RB26DETT engine

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Tapered Piston Ring Compressor Cooling System Components_Radiators This means the modification isFits 89. 0mm Bore Part Number : AR901 8900 ARP's ring compressors are CNC machined from 6061 T6 billet tube material and feature a true radius and they are relieved for wire O rings. Type 3 anodizing is used for long life, and the bore size is prominently engraved for easy identification. Standard stocking sizes from 3. 552" to 4. 750" (SAE) and 75mm to 100mm (metric).