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  1. 2005 LLY - Cold air intake

    Looking For/ Wanting To Buy
    Bought my son a 2005 crew cab. Would like to find a reasonably priced CAI, as well as many other mod's that are reasonably priced. (Gauges, exhaust, tuner etc.) Thanks, Brad
  2. MBRP 4" or 5"?

    06-07 LBZ & LLY Duramax Powertrain
    I have decided to make the first big mod to the truck, a new MBRP exhaust. Now I need to know everyones opinion of what I get with the 5" that I would miss with the 4". This will be down pipe back, removing the cat. My goal is performance, MPG, better sound. I don't need to wake the dead with...
  3. MBRP exhaust problems

    How To's, DIY and Write ups
    i recently purchased a 4" mbrp dp back exhaust system part #MBRP-S6004SLM. the retailer i bought it from said it would fit 2001-2010 gm trucks. when i got the exhaust i started reading the directions and they said 2001-2007. will this system work with my 2007.5 lmm?
  4. cat Delete, 2 PPE programmers

    Parts For Sale
    i have 2 PPE programmers from mine and my brothers trucks, we are going in on EFI and we need some cash first! 1-LLY - PPE xcelerator economy, 3 levels 50,90,140 , this is their older tuner without the side port for updates and will only work of 04.5-05 lly, works great no issues, still in...
  5. Single Stack or Leave It Alone...

    07.5-10 LMM Performance Parts Discussion
    I'm sure that this has been asked before, but I couldn't find the response I was looking for. I currently have a 4" MBRP straight pipe exhaust on my truck with a 6" tip. I was never really crazy about trucks with stacks, especially single stacks. But after going tomultiple truck pulls and...
  6. PPE Hot Race + MBRP 4"

    07.5-10 LMM Performance Parts Discussion
    Hey everyone! I'm a new member of DF, but wanted to "get my feet wet" and post something, so I figured I'd let everyone know that I ordered a PPE Hot Race and MBRP 4" turbo-back exhaust this morning from Meyer Performance, which I actually learned about from reading through the sites different...