ARP 4.000" Tapered Billet Aluminum Ring Compressor H753C4257 12 AN Female Swivel to

12 AN Female Swivel to 12 AN Female Swivel

1967-1986 Mercury Marquis

Chevy 1955-64

Extended Oil Inlet

and Carbon

ARP 4.000" Tapered Billet Aluminum Ring Compressor H753C4257 12 AN Female Swivel toARP'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