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GSC's oversize exhaust valve guide (+.001 in OD) is a single replacement for Honda K20C1 CTR engines. Offered individually, the slightly increased outside diameter accommodates cylinders requiring an undersized guide or minor machining. It provides a precise fit for valve‑train rebuilds when standard guides are not suitable, and should be installed with proper machining and fitment checks.
GSC Honda K20C1 CTR Exhaust Valve Guide +.001in OD - Single
