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  1. D

    Castech heads........I know, not again.

    Any recommendations on how to best apply the GM (Bar's) Seal Tabs? I know it requires 5/6 tabs (crushed) and inserted into the fill or top tube (not the surge tank), but since the radiator probably hasn't been flushed since new, should I flush and refill before adding the tabs? Or, add the...
  2. D

    Castech heads........I know, not again.

    Noob here. Although I'm looking for some feedback, I'm hoping this post will be of some value as well. Looking to purchase an 05 Tahoe but....................... So I've researched this pretty thoroughly and just wanted to run one thing by you guys. During my presale vehicle inspection...

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