Valve Guide Length Gauge, Clone Item Number: CL-2592 Price: $30.00 Add to Cart Currently Out Of Stock Description The 1.055" gauge is used to check the AKRA minimum length of the valve guide for the clone engine. Accessories Ported Performance Stock Head, Clone .950 Intake NoGo, Clone .962 Intake NoGo, Clone .967 Exhaust NoGo, Clone .974 Exhaust NoGo, Clone