MBRP Exhaust

Got the exhaust insert installed yesterday. I used the three disc insert with the end caps installed. (Had a friend tac weld the ends on). It was a little tight to jam it in and I had to grind the disc edges a little where the MFR process stamped them out because they were flared outward a bit. Put in a stainless set screw into the exhaust pipe to keep it from sliding back. I called the mfr before installing and the guy very happily answered all my questions, very friendly.

I immediately noticed a noise reduction right from start up. Once I got it on the road it was quiet enough that I could hear the exhaust leak between the stock cat pipe and the new mbrp pipe. (New gasket will be at NAPA this morning)

I’m going to take a longer trip this morning and get some highway time so that will really be telling. But I would say this thing is a drone killer for sure. Hopefully it doesn’t mess with my MPG too much because I did notice an increased efficiency with the new exhaust only.

 

Good to hear! I picked up a new gasket the other day as well. Is welding required for this install? I was hoping it would be a mallet tap in and G2G. I might reinstall new exhaust today w/o the insert to have a new baseline for comparison. Although, I'd hate to waiste an $18 gasket and have to rip apart the exhaust that never wants to come apart, a second time

 

Take a look at their website http://www.carchemistry.com/

They have those “end caps” that are only used if you want to get maximum noise reduction. The end caps should be welded on, they won’t stay on. You could probably get by with adding a couple of set screws in each end to hold them on.

Driving longer yesterday I still noticed the “drone tone “ during certain driving conditions but it was massively reduced. Probably just have it on my mind to listen to it but I think with a little time I would forget about it. If you want the best noise reduction I would say look at their silencer insert (4disk).

If you talk to the mfr and order direct maybe you could get them to tac on the end caps for you?

Also I may order the fourth disk for my insert to get just a little more reduction but I’ll Probably wait a while.

Also new gasket installed, much better without that leak noise.

 

Thanks for the tips! Glad your truck is sounding better. I actually found a short ss resonator that I might order. I have to put it after the muffler though, which I don't think is ideal. Take care

 

Yea I would say this is a waste of your time. Go with the silencer insert you’ll be happy

 

I reinstalled my MBRP exhaust and I am pleasantly pleased with the improvement in sound. My original MBRP exhaust was unidirectional but it turns out that the second muffler I tried is not. Also, to make things worse, the drawing in the instructions is incorrect, which is why I believe I installed it backwards. MBRP said the MBRP on the muffler should always be visible (left to right) from the passenger side and all of their systems are this way. The installation drawing was opposite. The exhaust is a little quieter but most importantly, it has a much more consistent sound with less resonance. Also, I noticed my truck did not rev high today when i was on my commute home. There is an incline that previously caused an annoying loud sound. I hope the previous install didn't mess with my engine. So, if you have a MBRP muffler, check the direction if it sounds funny. Specific part numbers can be found in an earlier post.

 

My muffler only could go one way because of where the hangars were pre-attached. but maybe I should look at the resonator for proper direction? I can’t imagine it would make that much of a difference it looked completely Identical on either end inside and out.

 

I know this an old thread. But did the insert help and where did u install it. Thanks

 

Yes definitely! I purchased the three baffle insert and had the extra caps welded on. If I was doing it again I think I would purchase the “silencer” they sell. It’s a 4 baffle unit. I installed just back from the cat-back junction. I put in a 1/4” machine screw to hold the insert and this was not enough to hold back the exhaust force. It bent the screw and the silencer slipped by and now resides in the resonator muffler. It still does help but it rattles a lot. Waiting for the time to pull it apart and put it back where it belongs. The insert also returned my MPG’s to stock levels. Before the insert I saw some modest increases 1-2mph depending on conditions. When I move the silencer back I will put a 1/4” bolt all the way through the exhaust pipe instead of just one side.

 

https://www.carchemistry.com/silencer-insert/

Recommended ^^

 

Thanks. My mileage is definitely better. Engine revs out better and it gets to 6th quicker and stays there. So did you add a resonator before the muffler and what did you add.

 

At this point I’m running mbrp off-road style exhaust, Mbrp Resonator muffler, and exhaust insert. Reasonably happy with the quieting results. If you just want to hush the muffler I would suggest skip the resonator and go for the silencer insert.

 

Gotcha . Thanks. Wish there was something to add to the back like where the tip is.

 

You want it further forward to do the most good. In my case I ditched the exhaust tip all together so it just dumps out below the rear axle. It’s really not that hard to slip the silencer into the pipe, it’s just two bolts to open that part of the pipe.

I suggest buying a new $5 exhaust gasket while your in there though.

 

Update:

I inserted the exhaust insert up forward just behind the cat-back flange. I used a single 1/4” stainless screw inserted into the pipe tapped & threaded. After several months I noticed exhaust noise and idle rattle had increased. I checked the stop screw and it was bent back by exhaust force. I pulled the insert and found it had also bent pretty severely on the first silence ring. I straightened it out and put a new 1/4” bolt all the way through the pipe so it holds back the center pipe and not the rings. Hope this holds up better.

 

Do we have a vendor on this site can get a deal on MBRP exhaust?

 

@santas212, I know this is a bit dated thread, but I also am rockin an 09 DCSB w/ SC and K&N CAI. I'm thinking I'm going to go with your advice and get the silencer along with the S5322409 axle dump. I'm curious about your bolt through option for the silencer; would you mind posting a picture for reference? I'm assuming you went through the exhaust too? Did that cause any weird noises?

 

Super simple, I just took a 1/4” stainless bolt and drilled it straight through the exhaust pipe about 6-8” behind the flange where it meets up with the Cat side of the exhaust. Then I put two nuts on the one side to lock it so it wouldn’t rattle off. Then I slipped the “silencer” into the pipe so it would slide back and rest on the bolt I put through the pipe. It might jingle in there a little bit at idle but no other weird noises so far from This system.

 

Thanks for the explanation, seems pretty simple and straight forward. I just can't wrap my head around drilling holes into my exhaust pipe for some reason; mostly I think because of my lack of knowledge with exhaust systems. Seems like any extra holes could be a potential source for exhaust leaks, which isn't optimal. Do you think if I tack welded the silencer in the pipe that would be an alternative solution?

 

Your exhaust pipe is already blowing out right below the truck bed with this pipe so really what’s 2 little holes that you plug with a bolt. Is it sealed 100% no. But I don’t think it’s going to create any health risk of carbon monoxide in the cab or additional noise.

Welding will work but will be permanent. A bolt you can pull the silencer out later.