ARP 3.900 Tapered Ring Compressor 91930059 Adjustable arm for 1978-88 GM

Adjustable arm for 1978-88 GM Metric G-body cars features a threaded assembly which aids in correcting bump steer problems by lowering the arm up to 3/4" compared to OE style arm

Blue Irridium

00 in Compressed / 16

265 cc Intake

ARP 3.900 Tapered Ring Compressor 91930059 Adjustable arm for 1978-88 GMARP'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