Best Muffler for a LSX?

[Dubnova]

MF or look at SW (stainless works ) very nice product.

[Hart_Rod]

Does anyone have another part number for the Borlas? The one listed doesn't work.

[JJH Jimmy]

Originally Posted by Hart_Rod

Does anyone have another part number for the Borlas? The one listed doesn't work.

Here is a page of several sizes and configurations.

http://www.streetsideauto.com/search...s=borla+pro+xs

[68Stepbed]

Borlas.
http://vimeo.com/11390487

[JNJchev77]

My opinion... Magnaflows! Definitely run an H-Pipe as well. I was running true duals with my 5.3 and after I put on the h-pipe a couple months ago it really woke things up... finally getting tuned next week

[Hart_Rod]

Originally Posted by JNJchev77

My opinion... Magnaflows! Definitely run an H-Pipe as well. I was running true duals with my 5.3 and after I put on the h-pipe a couple months ago it really woke things up... finally getting tuned next week

which ones?

[Blackpony]

I have 3" with an x pipe and magnaflows with it dumped over the axle. It sounds awesome! ! I am normally not a fan or magnaflow but these were free so I though what the hell ill put them on. Glad I did!

[Hart_Rod]

Looking for part numbers or series on borla and magnaflows. Thanks.

[70ptta]

H pipe vs X pipe? any one better? im going with magnas on my 5.3

[jamesjones]

Originally Posted by Hart_Rod

Looking for part numbers or series on borla and magnaflows. Thanks.

This. I'd like to know what magnaflows people are using. I'm going to run the crap exhaust I have for now but when I upgrade, I'd like to go with a magnaflow or borla.

[JNJchev77]

Originally Posted by Hart_Rod

which ones?

I'm not really sure... they came with the truck so I decided to use them with the 5.3...

[JNJchev77]

Originally Posted by 70ptta

H pipe vs X pipe? any one better? im going with magnas on my 5.3

There is a thread on here somewhere...

I don't think there are huge differences when compared to each other. The sound is almost the same imo.

[shearjs]

These are the magnaflows I'm running on my truck with a 6.0. http://www.summitracing.com/parts/mpe-11236 They sound pretty good. Not overly loud, no drone, just a nice sound. They still come alive under heavy acceleration.

[siggyfreud]

Originally Posted by JNJchev77

There is a thread on here somewhere...

I don't think there are huge differences when compared to each other. The sound is almost the same imo.

I have the Borlas on my fuel injected motor. I LOVE the sound. I originally had Cherry Bombs when it was carbed, then Turbos, then Flowmaster 40s, and now the Borlas.

I went with an X-pipe over an H. I just figured that exhaust sound/flow was more likely to balance being forced into a merge rather than being able to go straight OR take a 90 degree turn.

[JNJchev77]

Originally Posted by siggyfreud

I went with an X-pipe over an H. I just figured that exhaust sound/flow was more likely to balance being forced into a merge rather than being able to go straight OR take a 90 degree turn.

I think you're spot on, much better flow. And the Borlas are a great sounding muffler.

I found that the x-pipe, for me, acted almost like true duals, seemed to lag a bit on acceleration compared to the H-Pipe. But I'm not running a huge HP motor so that's gonna have some affect as well... My 5.3 needed more back pressure

[siggyfreud]

No engine needs back pressure. What you probably benefit from was more exhaust velocity. The myth that engines need back pressure is just that, a myth. What you really want is the maximum exhaust velocity with the minimum back pressure.

Too big of pipes and you lose velocity. Too small, and you create a bottleneck (backpressure). Both are bad.

[66LSx]

Spintechs FTW!

(Have 6000's on mine)

[jamesjones]

Originally Posted by 66LSx

Spintechs FTW!

(Have 6000's on mine)

Spintechs are too "raspy" for my taste. I went with a Bassani catback on my LS2 GTO and loved it but it's too "exotic" of a sound for our trucks IMHO. It had that foreign supercar sound.

The Borlas and Magnaflows see like just the right sound.

[JNJchev77]

Originally Posted by siggyfreud

No engine needs back pressure. What you probably benefit from was more exhaust velocity. The myth that engines need back pressure is just that, a myth. What you really want is the maximum exhaust velocity with the minimum back pressure.

Too big of pipes and you lose velocity. Too small, and you create a bottleneck (backpressure). Both are bad.

Ya, guess I used the wrong term from what I actually meant, which was pressure drop. Thanks for setting it straight!

[67-72trucks]

http://m.summitracing.com/parts/bor-40352

[Hart_Rod]

Originally Posted by 67-72trucks

http://m.summitracing.com/parts/bor-40352

Thanks 67-72. I think I'm going to go with the Magnaflow. I'm down to these 2:

http://www.summitracing.com/parts/mpe-11256

http://www.summitracing.com/parts/mpe-12256

The only difference seems to be that the 12256 is 1" thicker thand the 11256. How do you guys think that will help/hurt sound or performance? thanks,

Rob

[Hart_Rod]

Originally Posted by Hart_Rod

Thanks 67-72. I think I'm going to go with the Magnaflow. I'm down to these 2:

http://www.summitracing.com/parts/mpe-11256

http://www.summitracing.com/parts/mpe-12256

The only difference seems to be that the 12256 is 1" thicker thand the 11256. How do you guys think that will help/hurt sound or performance? thanks,

Rob

Anyone?

[OKGMC4]

Did you notice that the 1" thinner muffler is 1" longer? Maybe it evens out in the end and it's really up to your space constraints? Wouldn't think 1" would make a difference but I guess it depends on the car.

[Hart_Rod]

Originally Posted by OKGMC4

Did you notice that the 1" thinner muffler is 1" longer? Maybe it evens out in the end and it's really up to your space constraints? Wouldn't think 1" would make a difference but I guess it depends on the car.

Yes, I saw that also. You are probably correct. I may call them tomorrow just to ask the question. Thanks!

[SeTx67]

Originally Posted by Hart_Rod

Anyone?

I had the 11229 on my tbss and it sounded great with longtubes and cats. That is a 3" in/out muffler though so to get the same size you'd need the 11226. I say if you want louder get the 11226 and if you want it a little quieter get the 11256