Cherry bomb extreme, no cats.

YouTube - chevy colorado 3.7L idle.AVI

 

stock and it doesnt sound any different then it did before i dumped it b4 the axle

 

the stock muffler is soo big though. I just need something a little quieter. Not that quiet. Plus my stock muffler is long gone.

 

dynomax super turbo muffler. its not dumped, single side exit, but it is very quiet but yet still has a nice deep sound. I love it. before this muffler I had a mbrp and it was MUCH MUCH louder with a lot more drone.

 

Ill tell you how to eliminate alot of drone and nasty sounds. Get rid of the actual dump and leave the muffler.

I had a magnaflow on stock taip pipe, then dumped, then removed the dump and now a new taip pipe.

The muffler before axle with no dump sounded SO much better than the samething with the dump.

Now i have this

i have the same muffler but almost NO drone and i still get my nice exhaust note.

(old pic)

 

just have them bend the pipe to match the notch maybe

I had a turndown for about 3 weeks and it drove me crazy, Boyd took me to his local shop and they hooked me up so it goes over the axle and I never hit it and it's sooo much quieter than the dump was

 

Ive been thinking about trying one of these mufflers and in your case it may help you out.

Dynomax Performance Exhaust | Mufflers | Dynomax VT Muffler

There stainless steel and summit has them for about 100 bucks

I was listening to them on you tube and they seem to work pretty good. But I have yet to see or hear one in person.

 

When I had no cats and a stock muffler with a dump I had no drone.. I miss that


It drones like a mother fucker now :shrugs:

I need to put my magnaflow back on and take the flow fucker off of it but I like how the flowfucker sounds up high :lol: hate it the rest of the time

 

Im in the same boat. Just got a notch and had to dump it before the axle. I have a flowmaster 40 and the drone/ sound is killing me. I'm going to get a shop to run it all the way back

 

i have a magnaflow dumped and its not to bad. i was thinking of running a new tailpipe though atfer my notch gets welded in. i may run the tailpipe under the axle... still wont be the lowest thing on the truck so i see no issues :shrug:

 

I have used Dynomax products and was very happy w/the exhaust note and being not too loud, and the longevity of the product. I haven't tried anything on my '09 GMC I-5, but I would investigate the Dynomax products. Also the harmonics of a downward versus side-facing exhaust should be obvious. The sooner the sound from the exhaust encounters a surface, the more resonance you are going to have. Stand next to a wall & pop an inflated brown paper bag and see how much louder it is than when you do it out in the open. Crude, but an effective demonstration of acoustic reflection and your perception of sound levels.

 

running a 2.5" thrush glaspak muffler dumps off right here in the pic

has a drone from 2-3k rpms. but i like it, it quites down at cruising speed

heres a video of my xhaust sound clip

 

flowmaster 40s dumped before the axle.... BLOWS... i dynamated it thinking it would help the drone a little.... BLOWS... im gonna have to just get off my lazy ass and take the pipes out back. the cai didnt help either lol like blue steel's it quiets down at cruise speeds.

 

I'm gonna check out the dynomax, either that or have my muffler shop make a pipe that will work with the notch. I could'nt believe the difference of going from having it dumped after the axle to before the axle. My back wall of the cab sounds like it vibrates now during certain rpms.

 

I get that vibration too. I thought it was the cup holder that covers the jack

 

It's something else for sure, my cupholder and jack assy. is long gone. I think its just the interior panel and back wall vibrating together.

 

Fatmat rattletrap.

80mils ftmfw.

I have duals into a magnaflow after an x pipe and its very tollerable dumped before the axle.

 

I went with a flowmaster hushpower II. But I havent started my truck in a year and a half but Im guessing its quite I had one on my Titan it was quite.