Need plug for stock LS1 return hard line.
Anyone know what size it is?

-=EDIT=-
Looks like an M14 1.5 metric adapter fitting. Gonna have to take a gamble and just pick one. Gotta get this car done asap.
Last edited by bayer-z28; May 2, 2012 at 08:32 PM.
The M14 size was fine, but the o-ring seat was too big, and the threads were off. Prolly a 1.25 thread. Didn't try to thread it.
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