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Old 02-05-2011, 08:53 PM   #1
K20JLG
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Join Date: Dec 2010
Location: Raleigh NC
Posts: 13
THERMAC...leave it or remove ? ? ?

I have a 84 K20 and I removed the stock manifolds with A.I.R. and installed new Flowtech Headers, but now I dont know what to do with the Thermac ...AKA the flapper and the hole underneathe where the sove pipe went....should I just leave it be or should I block off/ fix it to stay open ? ? Please tell me your thoughts / experience . Thanks

Last edited by K20JLG; 02-05-2011 at 10:21 PM. Reason: to expain more
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