Dodgezilla

I installed an MBRP muffler on my truck a couple days ago. It's louder than the Magnaflow I was running but not nearly as loud as the straight pipe. It's also not nearly as loud as some of the full MBRP systems I've heard on our trucks. Looking in the muffler, there are little louvers in a spiral pattern. I installed it with the smooth side of those louvers in the front thinking that the exhaust would flow more smoothly and be louder. Was this wrong? I really want the truck to be louder than it is now that I have been running straight pipe for a while. So, if I turn the muffler around will it be louder or quieter. I went to a website that said doing this would increase the resonance inside the cab but said nothing about it being louder outside.....

What say you guys????

Dodgezilla

Alright, after a half hour of searching I found my answer which is what I expected. Having the openings forward will be quieter. I can't believe I'm the only one who thinks this is a bit quiet. Every post I saw was from guys who thought it was too loud......

Jfaulkner

I actually tried both ways and it didn't seem to make any difference. I was actually going for quieter though.

oldmandan-1

I agree, I just put a MBRP muffler on mine (took off the cat also) and don't really like the sound of it. I put the smooth part of the louvers to the front. My '01 with a different muffler (not sure of the brand, got it from DTT, it had what looked like screen in it rather than louvers) sounded MUCH better.

The MBRP is loud enough, but it sounds kinda crappy....more of a "tin can/typical six cylinder" sound rather than a rumble like my old truck had!

Herrin811

You gotta get that mbrp hot a few times....Everyone told me, and its true...the more miles you get on them the better they sound...

Dodgezilla

I'm not saying I don't like the sound. i just want to turn the volume up a bit!!

2-Stroke

stacks maybe? you are getting there, its just a matter of time!

BossHogg

Mine has gotten noticalby louder it seems the more and more I drive it. At first I didnt like the sound because it wasnt loud enough, but It got louder than I thought it would as time passed!

HorseHauler

So who first started out with the mbrp muffler + kitty and then tried it w/o the kitty? How much difference is there in the loudness and sound? Make it much louder at all???

Herrin811

No way to know what u had before, but mine is CONSIDERABLY louder than our stock dually at work...Same goes for any other Cummins I see/hear on the road...

I heard a truck 2 weeks ago...When I looked around it was 3 blocks away=STACKS!! I tried to catch him but couldnt...I'm gonna have to hear an '06 stacked before I take that plunge....

tantruck

I orginally installed the MBRP and left the cat. When my SPS66 turbo came I left the cat off. It was a bit to loud, especially towing when I had some drone. They say the bigger turbo also increases the noise. Anyway, I put the cat back on and it's a good bit quieter. I believe I'm going to order a resonator and install it in place of the cat. I hear good reports about that combo if the missing cat is too loud for your tastes. I also hear that twins really quiet things down a bit - hmmmm - I wonder if I could convince the wife the twins are the only way to quiet it down.

BillnBama

Got about 15k miles pulling my 5th wheels (of the 48k on the truck) and MBRP has gotten louder over time.. and I never had any cats...

Dodgezilla

I'll be patient and hope that it gets louder. It's really no big deal.

2-Stroke, I'm heading your way tomorrow and you where I'll be eating my lunch...

gus's 03

ok, ill be the wise guy and spout off with the " the best way to install it and have it be loud is install it in the garbage can ans strait pipe it" coment...

Dodgezilla

Ya Ya. I tried that and it was just too loud for me all the time. I did like it and it made me feel like more of a man especially with that 6" tip I just put on. Nothing says I can't go back to the SP.......except my wife........