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Old 01-07-2026, 04:50 PM   #25
JSH


 
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Drives: '20 ZLE
Join Date: Jun 2020
Location: Mile High
Posts: 4,195
Quote:
Originally Posted by Joshinator99 View Post
My MM Wild has a one way check valve in it, so it’s a regular closed system catch can 99% of the time, which is good. The breather portion only opens if it sees positive pressure from the crankcase, so it can relieve that excess pressure (hopefully before a seal blows out)…
Mine didn't come with one, but I think I've got a valve cover breather that has the one way Puck in
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2020 ZL1LE A10.
LME LT4 390 short block, LME CID Heads, Kong E2650, FBO.
15" conversion, MT ET Street R 325/15.
100 octane: 1045hp/1055tq.
100 octane + Meth (1x10+): 1117 hp/1067 tq
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