ARP Tapered Piston Ring Compressor (AR899-9050)

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ARP RING COMPRESSOR 3.905"Fits 3.905" BorePart Number: AR899-9050 ARP's ring compressors are CNC machined from 6061-T6 billet tube material and feature a true radius and they are r elieved 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). Show more