ard conrods sr20det h type (no rod bolts) our h-beam conrods have proven their strength and reliability in countless of high powered tuned cars that are used in pro drag racing and other endurance and circuit used cars. length 136.3mm big end diameter 51mm big end width 22.8mm small end diameter 22mm small end length 22.8mm material sncm439 bolt size 3/8-24