ARP 3.770" Tapered Ring Compressor RS004C18 Factory calibrated resistor does not

Factory calibrated resistor does not require free-air calibration

On cars with limited ground clearance

3000-3400 lb Car Weight

The aFe Pro-GUARD 7 performance air filter represents the next generation of performance filtration

1974-1981 Buick Century

ARP 3.770" Tapered Ring Compressor RS004C18 Factory calibrated resistor does notARP'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