ARP fasteners Tapered Piston Ring Compressor AR900-2500 Product:fits 4.250" Bore Compare this to pumps that

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ARP fasteners Tapered Piston Ring Compressor AR900-2500 Product:fits 4.250" Bore Compare this to pumps thatTapered Piston Ring CompressorFits 4. 250" Bore Brand: ARP Part Number: AR900 2500 Description: 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).