I have a set of Carrillo Rod stretch bolts that are within spec (under torque spec at .006"), just used to re-size a set of 911 rods so all have been checked OK. The bolts may be used indefinitely as long as they are installed correctly and within spec. Owner wants all new parts for his project. New bolts are $50 each (ouch), will sell for half price at $25 each. Part # is 3/8 SPS CARR x 12.
Cole
Price reduced to $20 each. Shipping included lower 48.