ARP 3.890" Bore Piston Ring Compressor Tapered Billet Aluminum Black Anodize - Each 31004 0:1 AFR (Requires Wiring) 0-5V

0:1 AFR (Requires Wiring) 0-5V Output Lambda values from

Header Tab Kit

GM Replacement Style

Single Layer

Not only will you get increased performance but you will also see lower EGTs and increased MPG

ARP 3.890" Bore Piston Ring Compressor Tapered Billet Aluminum Black Anodize - Each 31004 0:1 AFR (Requires Wiring) 0-5VARP'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