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Discussion Starter #1
just bought my 2005 LLY duramax and was wonder what suggestions/input anyone may have as far as taking off my cat converter and what to put in place of it. i'm looking at a dual 4" stack kit from XtremeDiesel.com but am not quite sure if this will bolt right up after i remove the cat. also i'm looking to put in an egr blocker plate. how would i would go about doing this? and will it throw a code?
thanks,
Dylan
 

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Discussion Starter #2
another thing.. how difficult is the cat removal process? DIY day project?
 

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You can just cut the cat out and put a piece of straight pipe from napa or oreilly's in its place. If you want to do a stack kit, just buy one from downpipe back without the cat. 4" are a little small for my taste, but to each their own!

Putting a straight piece in shouldn't take more than an hour at most. The stack kit shouldn't take more than a couple hours so long as you have the right tools
 

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X2 easy to do all the muffler stuff. you will throw a code though if you block you EGR. i dont if you have a tuner or not but you will need one to clear the code for good. fill out your signature so we can help in the future
 

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thanks for the help. If you get the chance and wouldn't mind, could you look up on Xtremediesel.com, part #MBS8000409 and see if that sounds to you like everything I'll need for the kit to install smoothly.(aside from the tips) or will I need to also separately order an exhaust downpipe?
 

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Yeah but damn that seems expensive. I suggest posting a thread in the vendor price request section. I bet someone on here can get you a better deal. I put mine together for about $150. straight pipe to delete cat/dpf and flex pipe into the bed. I run a single stack that I made myself, but still all you would need is a y pipe and whatever tips you want.

A down pipe is a worthwhile investment but not mandatory for what you want.
 

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Discussion Starter #7
X2 easy to do all the muffler stuff. you will throw a code though if you block you EGR. i dont if you have a tuner or not but you will need one to clear the code for good. fill out your signature so we can help in the future
I actually have a GM tech 2. brother-in-law used to be a mechanic but isn't around anymore to really help me out. but i still have it, and the technology to clear the codes! is there a special plate to buy to block the EGR?
 

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Discussion Starter #8
yeah. a little more than i was looking to spend. I had also looked at the grand rock powerflow "Y" pipe. much cheaper and had good reviews. Just wanted to make sure the complete works were there. But i'll have to throw a post in there then and see what comes up. thanks for checkin' that out for me
 

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