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exhaust

  1. L

    08 Alpha Catalytic converter individual replacement, why not?

    Besides tight clearances, is there any technical reason not to individually replace each cat? Mine are shot, and constantly throwing code P0420/P0138 and won’t pass emissions. Probably doing the extender trick for the short term. At close to $1000 to replace both driver’s and passenger side...
  2. D

    H2 owner from MI - looking for some experienced advice from you guys

    Hey everyone... Im new and have posted a couple questions on existing H2 forum threads in hopes to get some much needed advice. Ive had my 2003 H2 since 2002 and even though I am so in love with her (my "BadHumvee" was the 1st car I bought & paid off on my own...and I had wanted a Hummer since I...
  3. Ron46

    exhaust questions

    Hey guys, as I was power washing the underneath of my truck, I was looking at the exhaust. I was thinking about a couple different thinks. First, couldn't I just unbolt the muffler and resonator pipe and gain hp just from that without loosing low end torque. Second, if I do a whole exhaust...
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