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  1. 98greenatalie

    Can someone explain CatBack to me?

    I'm wanting to completely redo the exhaust system on my 98 GMC Sierra K1500. Right now I have Y pipe. Single in dual out through flowmaster 40series. With cats. It really is not accomplishing the deep growl sound I want. Any advice in a good setup? Thanks very much!!
  2. 98greenatalie

    Wheel and Tire!

    Hello all, new to the forum, seems like there's some awesome stuff going on here. A lot of guys on here with good knowledge. Anyways, I have a 98 Sierra 4x4 with torsion keys turned up about 2" and 1.5" lift blocks in back. Anyone know the largest wheel tire combo I can put on there without...
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