Manley H-Beam rods are made from 4340 forgings and weight matched to within +/-1.5 grams. The H-Tuff Plus series includes the heavier duty h-beam than the standard Manley h-beam and combines them with ARP 625+ rod bolts for ultimate strength. This kit will fit the stock sized wrist pins of 22.5 mm for the Mazdaspeed MZR DISI engines.
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