The Carrillo Pro-H connecting rod set for first-generation Mitsubishi 4G63 engines is supplied with 3/8" CARR bolts as specified in the description. These rods are intended as replacement connecting rods for builders and engine specialists working on early 4G63 powerplants, providing the specified bolt configuration and form factor required for correct installation during an engine rebuild or performance reassembly.
Carrillo Mitsubishi 4G63 1st Gen Pro-H 3/8 CARR Bolt Connecting Rods