Exhaust Silencer Removal

jedimaster · 04-05-2006, 04:03 PM

I wasn't happy with the XT being as quiet as it was. So I decided to remove the exhaust silencer- I used a pipe cutter to score and remove the silencer:

After that, I unbolted the pipe and put it on a bench to start cutting and measuring.

I used some simple exhaust clamps and a piece of straight pipe to fill the gap left by the silencer- remember, measure twice, cut once...

This is what the silencer looks like:

And here it is looking down into it- it's hard to tell from this pic, but the pipe goes straight through and there's a lot of baffling that traps sound.

Here's the final product:

Impressions: Upon startup, there's a nice little "thunder crack" as the beast comes to life. Once settled into idle, it sounds like it means business without sounding obnoxious. It actually sounds a bit like the Prodrive my buddy had on his WRX. On my own former WRX, I had a Bosal 3" catback on with no silencer and it was loud, obnoxious and droned like crazy. This is nothing like that- no drone, I suspect due to twin mufflers. It's not overly loud inside with the windows shut either, which was a concern. I can't say that it added any power- if it did, it's not much, but it does sound pretty damn good.

So overall, 45 minutes worth of work and very worth it. There goes the rest of the weekend project though- I had planned to replace the mufflers, but I'm quite pleased with how the car sounds now and anything louder might be too much.

ih8vtec13 · 04-06-2006, 08:36 PM

I just did this tonite, we took way over the time you posted here

but we got it welded and stuff too. Very hapy with it over all, but disapointed after hearing it with nothing after the 3rd cat.

jedimaster · 04-07-2006, 02:29 AM

Yeah, it's like when I changed my downpipe and listened to the exhaust with just the turbo and man it sounded weak with the rest of the exhaust attached

LGT Chris · 04-07-2006, 03:19 AM

Quote:

Originally Posted by jedimaster

Yeah, it's like when I changed my downpipe and listened to the exhaust with just the turbo and man it sounded weak with the rest of the exhaust attached

Are there real no exhaust options for the OBXT? It is probably the same template frame to build the exhaust, but your muffler and tip options are going to be in the crapper given that they point down and not out the back.

Drift Monkey · 04-07-2006, 04:29 AM

Quote:

Originally Posted by ih8vtec13

I just did this tonite, we took way over the time you posted here

but we got it welded and stuff too. Very hapy with it over all, but disapointed after hearing it with nothing after the 3rd cat.

Catless TBE FTW!

jedimaster · 04-07-2006, 12:44 PM

Quote:

Originally Posted by LGT Chris

Are there real no exhaust options for the OBXT? It is probably the same template frame to build the exhaust, but your muffler and tip options are going to be in the crapper given that they point down and not out the back.

I use a stock LGT wagon setup with longer hangers- couldn't stnad the limp **** look of the turn down tips.

ih8vtec13 · 04-07-2006, 12:49 PM

Quote:

Originally Posted by jedimaster

I use a stock LGT wagon setup with longer hangers- couldn't stnad the limp **** look of the turn down tips.

ROFLMAO!!!!!!!!!!!!!
great pleas no comparison potos out of the BB fourm

Drift Monkey · 04-07-2006, 12:52 PM

James has this done but I can't even tell with his two muffs in the way...

ih8vtec13 · 04-07-2006, 01:05 PM

Quote:

Originally Posted by Drift Monkey

James has this done but I can't even tell with his two muffs in the way...

It does sound better then with it in. I needed to get some stuff with my friend and we were thinking that one of those Cherrybomb mufflers they had in autozone may be pretty cool to put in place of the silencer and run straight pipe back no muffs. Quiet it a little and lose weight via mufflers. Any thoughts on that?

**Bu11dogg2** · 04-07-2006, 01:13 PM

I have heard this in person.

sounds awesome!!!

Drift Monkey · 04-07-2006, 01:34 PM

Quote:

Originally Posted by ih8vtec13

It does sound better then with it in. I needed to get some stuff with my friend and we were thinking that one of those Cherrybomb mufflers they had in autozone may be pretty cool to put in place of the silencer and run straight pipe back no muffs. Quiet it a little and lose weight via mufflers. Any thoughts on that?

I meant Random james just to clarify, but yeah. Why not just make a straight pipe back with no muff? Even less weight!

Looks weird without mufflers though...

jedimaster · 04-07-2006, 02:29 PM

I've done that, but it sounds weird. At WOT, the exhaust hits the ground, then the bottoom of the car and makes this really weird echo.

redstang98 · 03-22-2009, 04:42 AM

What size piping would i use on a lgt?

2.5sbd · 03-22-2009, 09:04 AM

Yo was that first pic there before?
That is nasty. How long do you think that guy have them eating at his leg

john · 06-25-2009, 07:20 AM

What the fsck is that first picture??

**Dookie** · 06-25-2009, 10:09 AM

The Jedi strikes back.

04/2.5gt · 08-16-2011, 06:34 PM

i have 3 cats on my car does anyone think that removing one will make it much louder. i want my boxer rumble. sorry for stealing ur post

TSi+WRX · 08-17-2011, 04:12 AM

It will probably make it just a little louder, but what really caps exhaust sound levels is the muffler canisters. Without changing/altering those, it'll be hard to really bring out the "Boxer Rumble."

kagenmateer · 08-18-2011, 09:37 AM

^^^ Yep. Cans first, then each cat you remove after that will make it just a touch louder.

04-05-2006, 04:03 PM	#1
jedimaster Join Date: Mar 2006 Posts: 513	Exhaust Silencer Removal I wasn't happy with the XT being as quiet as it was. So I decided to remove the exhaust silencer- I used a pipe cutter to score and remove the silencer: After that, I unbolted the pipe and put it on a bench to start cutting and measuring. I used some simple exhaust clamps and a piece of straight pipe to fill the gap left by the silencer- remember, measure twice, cut once... This is what the silencer looks like: And here it is looking down into it- it's hard to tell from this pic, but the pipe goes straight through and there's a lot of baffling that traps sound. Here's the final product: Impressions: Upon startup, there's a nice little "thunder crack" as the beast comes to life. Once settled into idle, it sounds like it means business without sounding obnoxious. It actually sounds a bit like the Prodrive my buddy had on his WRX. On my own former WRX, I had a Bosal 3" catback on with no silencer and it was loud, obnoxious and droned like crazy. This is nothing like that- no drone, I suspect due to twin mufflers. It's not overly loud inside with the windows shut either, which was a concern. I can't say that it added any power- if it did, it's not much, but it does sound pretty damn good. So overall, 45 minutes worth of work and very worth it. There goes the rest of the weekend project though- I had planned to replace the mufflers, but I'm quite pleased with how the car sounds now and anything louder might be too much. Last edited by Dookie; 06-25-2009 at 10:09 AM.

04-07-2006, 12:52 PM	#8
Drift Monkey LGT.org resident p0st wh0r3 Join Date: Mar 2006 Location: Houston, TX Posts: 1,526	James has this done but I can't even tell with his two muffs in the way... __________________ DriftRyders Australian Rally Farm

03-22-2009, 09:04 AM	#14
2.5sbd Senior Member Join Date: Jul 2007 Location: South Jersey Posts: 227	Yo was that first pic there before? That is nasty. How long do you think that guy have them eating at his leg __________________ Perrin UP, Cobb Catted DP, Cobb Mid & Y Pipe, Cobb AP V1, Tuning Alliance stg2 map, Cobb CAI, B&M Trans Cooler

06-25-2009, 07:20 AM	#15
john Senior Member Join Date: Mar 2006 Location: Wisconsin Posts: 1,149	What the fsck is that first picture?? __________________ Look passive, be aggressive. Scare them. ‹^› ‹(•¿•)› ‹^›

08-16-2011, 06:34 PM	#17
04/2.5gt Junior Member Join Date: Jul 2011 Location: new humpshire Posts: 14	i have 3 cats on my car does anyone think that removing one will make it much louder. i want my boxer rumble. sorry for stealing ur post __________________ nasty nate strikes again!

04-06-2006, 08:36 PM	#2
ih8vtec13 Join Date: Mar 2006 Posts: 666	I just did this tonite, we took way over the time you posted here but we got it welded and stuff too. Very hapy with it over all, but disapointed after hearing it with nothing after the 3rd cat.

04-07-2006, 02:29 AM	#3
jedimaster Join Date: Mar 2006 Posts: 513	Yeah, it's like when I changed my downpipe and listened to the exhaust with just the turbo and man it sounded weak with the rest of the exhaust attached

04-07-2006, 01:13 PM	#10
Bu11dogg2 Super Moderator Join Date: Mar 2006 Location: FL Posts: 578	I have heard this in person. sounds awesome!!!

04-07-2006, 02:29 PM	#12
jedimaster Join Date: Mar 2006 Posts: 513	I've done that, but it sounds weird. At WOT, the exhaust hits the ground, then the bottoom of the car and makes this really weird echo.

03-22-2009, 04:42 AM	#13
redstang98 Join Date: Mar 2009 Posts: 2	What size piping would i use on a lgt?

06-25-2009, 10:09 AM	#16
Dookie ;-0 Join Date: Mar 2007 Location: Fresno - The arm pit of CA Posts: 5,045	The Jedi strikes back.

08-17-2011, 04:12 AM	#18
TSi+WRX Senior Member Join Date: Mar 2006 Location: Cleveland/Shaker Hts., OH - USA Posts: 2,268	It will probably make it just a little louder, but what really caps exhaust sound levels is the muffler canisters. Without changing/altering those, it'll be hard to really bring out the "Boxer Rumble." __________________ <-- I love Winky, my "periwinkle" (ABP) LGT! - Allen / Usual Suspect "DumboRAT" / One of the Three Stooges Me: '16 Outback 2.5i Limited Wifey: '16 WRX Premium CVT 7th Subaru Family

08-18-2011, 09:37 AM	#19
kagenmateer Senior Member Join Date: May 2007 Location: Boise, ID Posts: 1,277	^^^ Yep. Cans first, then each cat you remove after that will make it just a touch louder. __________________

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