LS4 Front-Drives 2005-2009 - In the market for new mufflers

I am looking for new exhaust. I have always loved my Flowmasters. I've had them on this car for almost 2 years and always sounds good on highway and in the city. I was on a 2 hour trip today and the hum inside the car almost drove me nuts. It has gotten a lot louder on the highway for some reason. So I'm looking for new mufflers. These are the choices I came up with. What do you think. SLP powerflo, Magnaflow oval mufflers, Magnaflow round mufflers, borla proxs mufflers

I am looking for new exhaust. I have always loved my Flowmasters. I've had them on this car for almost 2 years and always sounds good on highway and in the city. I was on a 2 hour trip today and the hum inside the car almost drove me nuts. It has gotten a lot louder on the highway for some reason. So I'm looking for new mufflers. These are the choices I came up with. What do you think. SLP powerflo, Magnaflow oval mufflers, Magnaflow round mufflers, borla proxs mufflers

I love my Flowtech Afterburners

I think you should go w/ some Magnaflows; they have a very deep rumble to them and are louder than the stock mufflers, but by no means are they overbearing. Also, there is no drone in the vehicle at cruising speeds.

i think you should go w/ some magnaflows; they have a very deep rumble to them and are louder than the stock mufflers, but by no means are they overbearing. Also, there is no drone in the vehicle at cruising speeds.

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I as soon as I got mine (catback) installed I thought this is how it should have sounded from the factory. Reminds me of the Factory SLP exhaust on the SS Camaros. Loud but not too loud for anyone.

i love my borlas very nice sound

I invite you to try something different. I did and love the sound it gave me.

How loud are those Alabama, lets say compare to Flowmasters? Also borla does have sweet sound, I put some on my g/f's car and it sounds pretty damn good, hate to say it but a better quality sound than mine.

Per your screen name are you talking about adding these to a V6 Monte?

I went a different route with Summit brand Race Mufflers and I'm very happy. They sounds great, but they could be a little louder.

Yep V6 and before anyone say's it won't sound like a V8 I know, trust me

cutout with stock mufflers. My friend has that on his gtp and they sound great.

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I as soon as I got mine (catback) installed I thought this is how it should have sounded from the factory. Reminds me of the Factory SLP exhaust on the SS Camaros. Loud but not too loud for anyone.

Still Have to agree with these guys. so X4

cutout with stock mufflers. My friend has that on his gtp and they sound great.

oh yeah forgot all about that....get a cutout for sure...i love mine.

How loud are those Alabama, lets say compare to Flowmasters? Also borla does have sweet sound, I put some on my g/f's car and it sounds pretty damn good, hate to say it but a better quality sound than mine.

They are audible but nothing like flowmasters. I don't think they're quite as loud as the Magnaflows but they are usually #3 or #4 in aftermarket horsepower tests (if my memory serves me correctly). Miles abouve Magnaflows and certainly higher than the Flowies. This being said, I love my cutout more than life itself :nod:

I've been wanting a cutout for sometime but just havn't done it. Either way I'm changing mufflers, but quieter mufflers with a cutout don't sounds bad. What kind of cutout to you guys have and where is it located? Also what size would I need? Where did you guys mount your switch?

I don't know if you are aware, or even a member already, but you might be able to find much better answers regarding your platform on www.montecarloforum.com. There are more V6 Monte's over there that share your same engine and have done exhaust work.

I was a member when I first got my car. When I was over there to much drama and it just got on my nerves. The questions or things I talk about over here are just basic questions that really don't have nothing to do with what engine I have.

What engine you have will determine the sound your exhaust will produce based on your muffler choice. It was just a suggestion. I'm over there a lot and I think it's a great community.

I know the engine will make the sound. Just looking for opionion on loudness and quality of muffler. I might have to check it out, I know when I was first over there it was cool but then it got full of drama and liar's so I found this and naioa

I hear ya. I'd probably get out of there too if it was like that, but I've never had any issues with any of the members. Some of the threads occasionally get tiresome, such as intake threads, but it's a good place. Take care.

I've been wanting a cutout for sometime but just havn't done it. Either way I'm changing mufflers, but quieter mufflers with a cutout don't sounds bad. What kind of cutout to you guys have and where is it located? Also what size would I need? Where did you guys mount your switch?

here is a thread with a some info on cutouts

http://www.ls1tech.com/forums/ls4-front-drives-2005-2009/1190921-electric-cut-out.html

mine is where the res used to be and is 2.5''....my switch is in front of shifter by the little cubby hole the GXP has.

found one when i still had the res. on

http://s447.photobucket.com/albums/qq194/DPUofF/car/?action=view&current=100_1069.flv

Quaility of material and craftsmanship as well as performance for sound I would go with Borla bolt ons....but for bolt on performance for single pipe and cat back exhaust, I would say Magnaflow...but this is just being a former Borla owner and the Magnaflow in just in my opinion because they have a lot of bolt on full systems for just about any car..so they hit it first for systems in my opinion, but havent been around alot of others...
Before turbo, I had two Borla turbo muffs with no cat or res....it was nice!!! i still have those around by the way with the custom made chrome double rolled in tips!! if anyone is interested:)

no mufflers res only with some nice tips. Think about how much weight you'll save. About 40lbs or so. That's 1/2 a tenth!!