ARP 3.780" Tapered Ring Compressor 121025 Heavy-duty 40 vane brake rotors

Heavy-duty 40 vane brake rotors provide added strength and cooling over standard 36 vane rotors

1960-1974 Ford F-350

Outside box dimensions 16-1/8" x 9-5/8" x 10-7/8" tall

GM F-Body 1982-1992

RaceQuip Vesta Series Helmets

ARP 3.780" Tapered Ring Compressor 121025 Heavy-duty 40 vane brake rotorsARP'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