Ok, if i was to have my exhaust redone which i plan on doing, i want to get the flowmaster super 40 si/do. I was thinking 3" inlet 2" outlets, or 2 1/4" outlets. How would the 2" pipe sound?? would it be louder because more exhaust flow is being forced through the pipes? Help me out.

 

I don't think the size of the pipe will effect the sound that much. You will probably notice most of the sound coming from the muffler being less restrictive along with your exhaust system not being hung properly which will cause alot of vibration to echo throughout your car. If anything if you want sound, you want a straight through style muffler, otherwise the more you have in the way inside the muffler, the quieter everything will be.

 

I dont think thats completely true. Magnaflow makes a straight through muffler and they are quieter than the flowmasters which have baffles inside.. So the size piping has nothing to do with sound for sure?

 

Anyone know??? Im getting my entire exhaust redone pretty soon so i need to get as much information as i can.

 

Go to the magnaflow, flowmaster, dynomax, etc. websites, and you may be able to find out exactly how each muffler will sound. The Dynomax muffler that I got sounded almost like pure open headers without the roar. Instead it just had a smooth deep tone.

 

is a single in singlw out louder than a single in duel out???

 

right now i have a crap si/do setup that was done pretty bad. So im going to have all new pipes bent and a new muffler. So i want it louder.

 

I'm not sure on this but I'm guessing that the smoother the inside of the muffler, the louder the exhaust.

I'm thinking, and I could easily be wrong, that the less a muffler absorbs vibration, the louder the exhaust will be.

If the Flowmaster has those baffles inside of it which all deflect and minimally absorb vibrations it probably doesn't quiet as much as something packed full of steel wool or roving fiberglass. The Magnaflow you speak of is, you said, "quieter"? There is probably very good reason. What exactly is the straight through design you saw? My muffler is straight through but when I say straight, I mean straight. Nothing but perforated 3.5" straight pipe from one end to the other. If gases go straight through a muffler but turns around 180 degrees one or more times in doing so, and also pass through perforated tubing, then go figure... It might just be quiter than the flowmaster with the baffles that don't block exhaust gases, but rather redirect.

I'm absolutely no expert on this subject but I do have a little common sense. The more vibrations are absorbed, and the more backpressure for your exhaust, the quieter the sound. And what the hey, the bigger the pipe, the lower the tone of the sound.

But really. Who cares about sound. If sound doesn't bother you, just run straight pipe after the catalytic converter with a bend in your pipe to get the gases out from under your car and to the side to reduce the amount of vibration your car will be absorbing and echoing into the cabin. See how that sounds for a day. If that doesn't suit you, consider what you want. more sound, moderate sound, low sound, or no sound. No backpressure, low backpressure, medium backpressure, you get the point.

Like I said. Check the websites, and listen to the tone of the exhaust from different make and model mufflers.

 

single in and out, or single in and dual out... It doesn't matter that much... Main thing is how freely the exhaust can flow and how much vibration the muffler will absorb.

 

Wait...Why buy a muffler if you dont care about sound?? Mufflers dont offer much horsepower anyways so why buy a muffler if you dont care about sound?. And i cant run straight pipes, i like the sound of a muffler and i need to beable to get a sticker. I dont mean to be rude but i dont agree what you said above.. All magnaflows are quieter than the flowmasters.