ARP 3.890" Bore Piston Ring Compressor Tapered Billet Aluminum Black Anodize - Each 7000BU 12 AN Male Inlet /

12 AN Male Inlet / Outlet

Double Adjustable Bypass Regulator

1978-1979 Buick Electra

Potentiometer String

ARP 3.890" Bore Piston Ring Compressor Tapered Billet Aluminum Black Anodize - Each 7000BU 12 AN Male Inlet /ARP's ring compressors are CNC machined from 6061 T6 billet tube material and feature a true radius for each different bore diameter. What's more, they are relieved for wire O rings on bottom. Type 3 anodizing is used for long life, and the bore size is prominently engraved in 3 4 in high numbers for easy identification. Standard stocking sizes from 3. 552 in to 4. 750 in (SAE) and 75mm to 95. 5mm (metric). The true radius design is far superior to