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  1. Turbo's Stock and Aftermarket.
    Just getting opinions if grinding off the heat shield mounting points on the exhaust housing would create a structural issue or should the housing be fine?
  2. Exhaust Videos
    2013 LML EGR, DEF AND DPF ALL DELETED. When I smash the gas a lot of black smoke and the turbo takes a good few seconds to spool up. Also the exhaust sounds like a gas burner and not a diesel.
  3. 06-07 LBZ & LLY Performance Parts Discussion
    Hi All, Long time lurker, created an account when I finally purchased my first LBZ. I am in the process of installing an MBRP Downpipe back exhaust and am having some issues. Long story short where the clamps/hangers are supposed to align, they dont.....Pics included: Where this pipe goes into...
  4. General Discussion
    Hey guys I’m back in the diesel truck arena after having been absent for 10 years Not a good time as trucks are high and fuel is outrageous…. But I felt like I could justify it for pulling my dump trailer… my 6.0 gasser screamed pulling it Found a good deal at least I thought it a good deal on a...
  5. 911 Problems Forum
    2019 GMC Sierra 3500 Manually regenerate 7 times. On our 3rd EPF exhaust system. Replaced turbocharge once. Replaced number nine injector. EMF sensors Knox sensors replaced. Owned less then year. Unable to pull more than 5000 miles before engine light comes back on. Mountains and weight seemed...
  6. General Discussion
    Hey Dmax Forum, I have a 15 Sierra 2500 and I'm getting a rattle noise on decel at lower rpm from what sounds like the front drivers side fender. It sounds like metal, thin metal and I cant find what is causing the noise. It doesn't sound like an injector tick. If I had to describe it I would...
  7. 911 Problems Forum
    Hey so som9ne stole my cat now I have an engine power reduced code on the dash please God someone tell me how to fix this I'm pretty sure it's just cuz compression how fo I add compression
  8. 07.5-10 LMM Duramax Powertrain
    So, I bought a used 2008 3500HD 4x4 Crew Cab Dually. Living in PA, I am required to have a muffler. The exhaust was replaced at some point with nothing but straight pipe. I cannot for the life of me find an exhaust kit that goes from the downpipe back that includes a muffler. Does anyone...
  9. Vendor Price Request ( Site Vendors Only Respond)
    Looking to purchase a 5" straight pipe for a LBZ CCLB, having trouble finding any on web searches for the Long Bed, most seem to be for the short bed. Thanks in advance for any help.
  10. 04.5-05 LLY Performance Parts Discussion
    Hi everyone, I have a stock 05 LLY Sierra 2500HD. I was changing out the thermostats when I noticed an oily soot build up down from where the EGR intake manifold connects to the engine. Is there a gasket that should be replaced there and is it as simple as unbolting the manifold at that spot and...
  11. Performance Upgrades
    I've been looking into deleting my 2016 GMC 2500 Duramax and wanted to see if anyone had suggestions or comments. I'm planning on ordering a 4 or 5-inch straight pipe exhaust and GDP tunes on an EZ Lynk device. Would this process be as simple as taking the truck to a muffler shop and having them...
  12. Aftermarket Mods.
    I have a 2011 Chevy 6.6. In search of the best exhaust system to get but don’t want to deal with programming. Just looking for sound and if it betters the performance great if not then oh well. Thanks.
  13. General Discussion
    Hi there I have a 2016 GMC 2500HD This is my first diesel truck, I love it. Hated the emissions, bad fuel milage, and the stupid DEF tank hanging below waiting to get ripped off on my first hunting trip 150KM from the nearest town. So a month after buying the truck I deleted it and blocked...
  14. Looking For/ Wanting To Buy
    Apparently the jackwagon that owned this truck before me cut the cat off. Does anyone have one laying around? (Doesn't need to be functional BTW, just pass a visual check.)
  15. Introductions
    Hello all! I finally got the truck of my dreams having custom ordered, from the factory a 2021 2500 HD, CrewCab, 4x4, Z71. As of today it has 1227 miles on it and from day one there has been issues. 1st issue was pulling to the left which has now been back to the dealer twice and is still...
  16. Looking For/ Wanting To Buy
    Just looking for after market exhaust manifolds, and down pipe for my 2005 GMC Sierra 2500HD. Thanks Leonard [email protected]
  17. Maintenance
    Hello all. I have a 2015 GMC Sierra 2500HD with the Duramax 6.6 with 163k miles. A few months ago the message on the dash started popping up letting me know the DPF was being cleaned and to keep driving. Then a few weeks ago it started reducing power. I've got an ash problem that the regen can't...
  18. 06-07 LBZ & LLY Performance Parts Discussion
    I want to get a new exhaust for my lbz but I won't be making big power for another year or so. I dont want to short myself and get a 4 inch cat back because I will want the turbo back eventually. Ive heard it can cause more lag in lower rpms. Is this true? Is there any other red flags with this?
  19. Aftermarket Mods.
    So I’m new to the diesel mechanics I’m no Mechanic myself but as far as bolt up parts go I’m pretty confident I don’t want a race truck just Some more power and for it to souls good I have a stock 09 lmm that just hit 100k truck is very sound and well maintained when it comes to power with our...
  20. 11-16 LML Performance Parts Discussion
    Good Afternoon, I have been searching the archives for for a High Flow Diesel Particulate Filter (DPF) that will offer a louder volume to pass through. I have discovered that Bully Dog has made a performance Diesel Particulate Filter (DPF) for specific generation f0rd and d0dge trucks and I...
1-20 of 50 Results