Set of 8 ARP2000 replacement rod bolts for all popular Miata forged rods. Rod bolts should be replaced every time they are untorqued. Buying used rods for a budget build? You absolutely need to replace the bolts!
Standard 3/8" rod bolt fits Manley H-Beam and most other popular low-cost forged rods. Optional 5/16" rod bolt fits Carrillo A-beams. Both sizes are 1.500" UHL (underhead length). This is correct for the rods we use at Trackspeed (Manley H-beam and Carrillo A-beam). Measure your old bolts to verify if you are unsure.