MBRP Turbo Outlet 3" Performance Duramax Down Pipe

List Price: $271.75
XDP Price: $119.99
You Save: $151.76 (56 %)

2004.5-2010 GM 6.6L Duramax LLY/LBZ/LMM
Manufacturer: MBRP Performance Exhaust
Mfg. Number: GM8424
XDP Part Number: MBGM8424

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XDP has teamed up with MBRP to help produce the missing link in the Duramax Exhaust System. Now Duramax LLY/LBZ/LMM owners have the ability of connecting the turbo and aftermarket down-pipe back exhaust system by removing the restrictive stock pipe pictured below. The MBRP down pipe provides a smoother flow from the turbo resulting in lower EGT’s and increased performance. The down pipe is a relatively easy install due to the precision bends that you’ve come to expect from MBRP.


  • 3" Mandrel Bent
  • Extra Thick Aluminized Steel
  • Satin Black Ceramic Coating 
  • High-Heat Thermal Wrap
  • Steel CNC Machined Flanges


  • Smoother Flow from Turbo
  • Reduced EGT’s
  • Increased Performance
  • Throatier Sound
  • Faster Turbo Spool-up

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(68 Ratings, 4 Reviews) Average Rating:
worked great
Alex Parker (central valley California ) 11/13/2014 4:42 AM
for me it was harder to remove the stock "downpipe" than installing this. Looks great, changed the sound (for better) lowered egt's. Well worth the price.
MBRP Turbo Down Pipe
Logan (Lakewood, CA) 11/5/2013 11:42 AM
This pipe arrived to my door fast and as promised. This MBRP is a quality part and fit like a glove. Stock part came off easy (use flex head ratchet wrenches) and use the assistance of a friend. Take off the two nuts for the dip stick but leave it in the trans. Just needs to wiggle around to get the old pipe out and the new one in. Take out the exhaust hangers and slide the pipe to the rear. Install time was just under 1:30. Now my exhaust sounds so much better at idle and comes alive past 2200 RPM. I have no idea about lower EGT's or how much HP was created, but yeah, it does that too. Without this Down Pipe installed you are pretty much wasting your money on all other upgrades as the stock one is very restrictive.
MBRP downpipe
Jordan D (Downing WI) 4/12/2013 11:46 PM
I bought this for my 07 lbz and couldnt be happier. Spool up time is reduced, sounds great and fit like a glove. i heard mixed reviews about the diamond eye downpipe fitting better, but this literally slipped right in on the first try. Had a little issue getting the transmission dipstick removed and put back in, but we got er figured. Definitely worth it. the Stock dp just doesnt compare.
XDP Tech
Kyle (NJ) 9/29/2009 9:58 AM
My name is Kyle and I was fortunate enough to try out the new MBRP Duramax Downpipe. First I’d like to say I was very pleased with the construction of the pipe. the welds were very clean and the sheer weight of the pipe was of the upmost quality that you have come to expect from MBRP. After an easy 1 hour install, just pulling out of my garage I had already noticed a difference. not only was the truck a bit more responsive, but the EGTs were already lower than normal, down around 315*! just so i had a good base number, I recorded my egts at 70mph with the stock down pipe before I took it off. on my initial test drive at 70mph I had dropped 57* degrees with the new MBRP down pipe! this was far from the best part though, the truck also pulled harder in the mid to top end and had a noticeably throatier V8 sound. the EGTs would also drop incredibly faster after accelerating. after seeing 950*, just 30seconds later it would drop down to around 375*. that was actually a full 30 seconds faster than it took to get there before. not only will this Down Pipe help keep temps under control while towing or daily driving, but also allow your turbo to last longer and make more efficient power by reducing that one last restriction in your exhaust system. we've all spent countless hours trying to get the most out of our trucks, so don't settle for leaving a stock pipe in there when the rest of your system is free flowing. I would classify this part as a must do for any 04.5 and up duramax owner.