Ghetto OEM muffler hack job project

[Thresham]

My friend and I were bored, so we decided to do a little hack job on my stock axleback to see what kind of sound we could get out of it.

First we opened up the casing.

http://img.photobucket.com/albums/v296/akumaxkun/WRX004.jpg

We proceeded to hack out most of the innards, with not much of an idea how big a difference there would be.

http://img.photobucket.com/albums/v257/exceldriver/Exhaust/WRX005.jpg

We figured that should be plenty for now... So we closed it back up...

http://img.photobucket.com/albums/v257/exceldriver/Exhaust/WRX001.jpg

Threw it on the car and fired it up.

So far, its a little bit louder than an STi axleback. I'm a little surprised its not louder than that, but we didnt cut the baffle walls at all, so can't expect too much volume. It's certainly louder than stock, and doesn't sound bad. It produced a nice agressive oem noise for now, just beyond the STi muffler.

Not a spectacular project, but something to do on a boring day :)

I don't have any videos yet, I'll try to get some next weekend.

[RS-ti_Andy]

hahah i always wondered!

cool cant wait for sound!.. also is that muffler stainless? if so decent welds lol

[Thresham]

haha yeah I cant wait to get some vids, I haven't been able to hear it from outside yet, only driving.

ps... Your signature totaly rickrolled me.... again....

[newbie101]

i was thinking of doing this but just never got around to it

[JacksonRally]

I did this to my car about a month after I got it. I cut open the casing and just kept the black part (the one that goes to the exit/exhaust tip) and rewelded it onto the tube that enters the muffler. It ended up shortening the whole setup but I added another piece to bring the end out to the bumper. Mine is pretty loud.

http://i198.photobucket.com/albums/aa15/Jackson-Rally/982007023.jpg

It ended up being pretty low profile too.

[RS-ti_Andy]

haha yeah I cant wait to get some vids, I haven't been able to hear it from outside yet, only driving.

ps... Your signature totaly rickrolled me.... again....



hahahaha! man.. sort term memory slipping?:eek:

[Thresham]

Here are the videos of the muffler, turned out pretty well.

http://www.youtube.com/watch?v=p_2Q0MuhgMk&feature=related

http://www.youtube.com/watch?v=k10akD0yCnc&feature=user

[RS-ti_Andy]

DUDE!!!

thats sounds sick!

awesome job!

i even commented one lol

[Bloodandempire76]

My exhaust job was similar...kinda. I drilled a hole in mine between the two pipes, then rammed a 2" prybar through all the baffles, then welded the hole closed with a plate...its...very loud growling boxer type exhaust, basically its a resonated straight pipe. Speaking of which, I got pilled over yesterday for having a loud car and the cop told me to wash my car while he was giving me my ever so thankful pink warning slip.

[wrxisthebest]

hahahahaha... take those baffling walls out... do it!!!

[RS-ti_Andy]

DO IT!@!! lol

[rubberbiscuitt]

awesome job!!!

we need to do something similar to that for the rally car. that glass pack on there now has just too much honda rasp.
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[BlueREX04]

that is cool I did the same thing but did not cut the main exit tube and the vertical supports but everything else went and it makes a small difference.

[Redrex]

Hoping to do this next week to my rex sometime. Did you just use a grinder to open the muffler?

[frogstar7055]

Here are the videos of the muffler, turned out pretty well.

http://www.youtube.com/watch?v=p_2Q0MuhgMk&feature=related

http://www.youtube.com/watch?v=k10akD0yCnc&feature=user


I just cut the muffler off and ran a straight pipe out the back.

Sounds about like that,no where near as loud as I thought it was gonna be.

[Zakster87]

I just cut the muffler off and ran a straight pipe out the back.

Sounds about like that,no where near as loud as I thought it was gonna be.

How does that sound? I'm contemplating doing the same, just having the local mufflershop make up a straight pipe axleback... (main reason being the bolts are rusted to the point I cant get them out)

[HeathyVT]

How does this effect back pressure and gas mileage?

[SilverSleeper04]

How does this effect back pressure and gas mileage?

In wrx's, or other turbo models, it doesn't affect the back pressure. Straight pipe it or just hacking the stock muffler, it doesn't matter. The turbo is what maintains back pressure. n/a cars are different story...as I'm sure you can guess :). As far as gas mileage goes, it doesn't help or hurt it....well maybe it helps it, but I doubt it's significant enough to be noticeable.

[RS MN]

In wrx's, or other turbo models, it doesn't affect the back pressure. Straight pipe it or just hacking the stock muffler, it doesn't matter. The turbo is what maintains back pressure. n/a cars are different story...as I'm sure you can guess :). As far as gas mileage goes, it doesn't help or hurt it....well maybe it helps it, but I doubt it's significant enough to be noticeable.

its not the backpressure on NA cars that you need to worry about, its the exhaust gas velocity.

and something like this wouldnt be an issue for an NA car, and if it effected power at all, it would be a minimal effect.

[Rallyme02]

i straight pipe my 02 wrx, i just gutted both catts off from turbo back then axle back i used 3inch sounds good

[99Forester]

I was bored as usual the other day and was contemplating doins something similar although I find it hard to bring myself to tear apart a perfectly good muffler... lol

[Suzuki]

How does that sound? I'm contemplating doing the same, just having the local mufflershop make up a straight pipe axleback... (main reason being the bolts are rusted to the point I cant get them out)


you can always get the bolts out... you just need finese~

...and probably a torch.

[RS MN]

you can always get the bolts out... you just need finese~

...and probably a torch.

and PBlaster... lots and lots of PBlaster...