Tapered Piston Ring Compressor AR900-3900

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Tapered Piston Ring Compressorfits 4.390" BoreAR900-3900900-3900Arp's Ring Compressors Are Cnc Machined From 6061-t6 Billett ube Material And Feature A Tru e Radius For Different B ore Di ameter. What's More, They Are Relieved For Wire O-rings On B ottom. Type 3 Anodizing Is Use d For Long Life, And The Bore Size Is Prominently Engraved I n 3/4 High Numbers For Easy Id entification. Standard Stockin g Sizes From 4 To 4.65 (sae) A nd 75mm To 95.5mm (metric). Th e True Radius Design Is Far Su perior To Conventional Tapered Devices, And Widely Acclaimed By Professional Engine Builde rs ! This Is Truly The Very Be st Piston Ring Compressor On T he Market Today. Show more