ARP Main Stud Kit - B16A Mazda Universal O2 Spacers with Catalytic

Universal O2 Spacers with Catalytic Converters scrub the exhaust and lengthen the distance between the O2 sensor(s) and the exhaust flow to reduce the chance of a CEL

Made by the same OE supplier as the originals

Black wrinkle coated 6061 aluminum piping

Engineered Performance Rotor

82L plenum volume) to distribute even airflow to all four cylinders under dynamic load conditions

ARP Main Stud Kit - B16A Mazda Universal O2 Spacers with CatalyticARP Main Stud Kit B16A ARP Main Stud Kit B16A These ARP main studs are made from 8740 chromoly steel and have a 190,000 psi tensile strength rating. They are precision centerless ground and thread rolled to Mil S 8879 specs, with a black oxide finish for corrosion resistance. The kits come complete with hardened washers and high strength hex nuts.