Damn that sounds good. Hoping I get similar results.

 

75 lbs worth of piping came in today

4" is serious stuff. It's crazy to think that I was considering 5 inch, but it cost $200 more. I just don't see it being worthwhile On this set up.





The muffler is only 15.5 inches long. So I really don't see it doing much in terms of sound reduction. But we'll see.







Anyways, this seems like a pretty nice kit for the price. It does cost $500 less than my old Corsa catback. Yeah it's not stainless steel And it doesn't come with nice band Clamps but is still a pretty good value at $287 shipped in my opinion.


Oh and I forgot to add, after some measurements I discovered that I won't even need the front most piece of pipe That connects the downpipe that comes with the kit. So conceivably somebody looking to do a similar set up in the future could just find the Duramax catback kit Instead of the turbo back kit. It seems to be about $40 price difference.

 

Are you going to weld the kit in?

 

Nope. Everything should be slip fit, I'll just have to trim some of the pipes to proper length. The only thing I would do differently if I could weld would be to weld in a ball and socket joint at the down pipe connection.

 

flowmaster sells some universal ball and socket exhaust parts

 

Got the MBRP exhaust on. It was all basically bolt on. I had to literally cut 1" off one of the pipes and that was it. The tailpipe needs to be trimmed but that's only because of my 6" rear drop. On a stock height truck it would be fine.

I didn't need the turbo back pipe or the 18" extension pipe. These kits clearly are designed for CCLB trucks and the rest are trim to fit.

Unfortunately, it's still loud as ****. Not S.O. approved. I may need to go to the 30" magnaflow.

 

Took the truck out to do some non-boost tuning, mainly highway. Got on the highway and found myself tipping into boost just a couple psi but noticed blue smoke out my exhaust. That turbo whistle is just addicting. Forgot I was still running the stock PCV setup. I'm thinking that's why I had blue smoke out the exhaust, but it could also be the way I have my oil drain routed. I'm going to fix my PCV and then re-asses.

Here's what I'm doing for my PCV. It's a fully closed PCV system that works like stock but will positively evacuate the crankcase during boost.

I drilled/cut out my driver's side PCV valve so it's just a port now. And I'll be using an LS1 passenger valve cover that has 2 ports compared to mine which only has 1.




Top port goes to intake vacuum port. Bottom 2 ports connect to valve covers. And then a separate line will go from my air filter to the 2nd port on the passenger valve cover for vacuum while under boost.

 

Where did you buy that and how much was it. I am only about a week away from needing one of these myself. PM me if it's a non site sponser. Thanks

 

more info on exhaust i need the same thing

 

i got it from Mightymouse on LS1tech. $135.