DHD 007-0227 Duramax Diesel Brass Fuel Test Port Cap
DHD's brass fuel test port cap replaces the OE test port and removes any chances of having a test port leak. The elimination of the test port reduces the height of the line and provides extra clearance for customers looking to install modified intakes or multiple charger setups. This brass cap does not replace the black plastic OE dust cap, it replaces the entire test port.
Fitment: 01-10 Duramax 6.6L
Related O-Ring: 94011618
Replaces OE Cold Start Valve Test Port # 12637722
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