LS Engine Coolant Temp Port Adapter - M12 x 1.5 to 1/8 NPT
LS Engine Coolant Temp Port Adapter - M12 x 1.5 to 1/8 NPT
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LS Engine Coolant Temp Port Adapter - M12 x 1.5 to 1/8 NPT

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Raceworks Branded LS Engine Coolant Temp Port Adapter / Reducer - M12 x 1.5 to 1/8 NPT

Allows the spare water port at the rear of the drivers side head to be adapter from the uncommon M12x1.5 Thread to a common 1/8 NPT Thread. Perfect for aftermarket gauges or LS conversions where you're trying to get the factory dash working.

Also required when using our VN-VS Plug in LS Harness