DIY Low $ Muffler Delete

ResIpsa · 01-13-2013, 03:34 PM

I originally devised this DIY as a low buck mod to improve the sound of my 370Z at the track. However, I think this could be used with anyone trying to develop any type of system intended to replace the stock muffler that does not have the ability to weld.

WARNING: Anyone attempting this DIY should be prepared to deal with a sheared exhaust flange stud. Please, just assume that you will shear at least one stud in the process.

If the stud shears while you are attempting to loosen it you will need to drill it out from the bottom. Make sure that you have a full set of sharp drill bits. Use a punch and create a notch as close to the center of the back of the stud as possible. Now put on some safety glasses and start drilling with a small bit until you get through the stud. Then just keep stepping up the size of the bits until you can insert a bolt to replace the stud.

However, if the four exhaust flange nuts come off without shearing please apply ample amounts of anti-seize compound to the studs.

In my humble opinion, the greatest aspect of this DIY is finding the Walker exhaust flange repair kit part # 36130.

This completely opens up the possibility of developing a muffler delete that bolts directly to the flanges without the need for welding. They retail for $15 each at RockAuto and $20 at AutoZone. With this part, the sky is the limit.

Feel free to use mandrel bends, glass packs, or whatever. Just use your imagination.

As you see, my set up is the bare bones lowest $ setup. However, this is something that anyone can do with parts available at the local AutoZone. And the sound is insane!

Initially, I attempted a setup that exited the car just as the stock exhaust did.

However, this setup utilized flex pipe that I found to be a weak link. In the end, I just connected two sets of 45 degree angle pipe (again, available at any auto parts store).

Keep in mind, that you should purchase your pipe from the same type of store as different stores pipes don't match up.
This resulted in the end of the pipes angling down toward the exhaust cutouts in the bumper.

Is this setup pretty? No.

Although, when painted flat black the pipes are not very noticeable.

In the end, you can create a set of muffler deletes for around $70 that can be swapped on and off in around 20 minutes (please apply plenty of anti-seize every time you un-bolt them). Who could hate on this?

Jordo! · 01-13-2013, 03:55 PM

Nice DIY -- also, that flange repair kit is pretty awesome! A great alternative to dealing with welding.

CDepp · 01-13-2013, 06:27 PM

I want to hear it! Get a video asap, please.

nice DIY!

scgolfer7 · 01-13-2013, 10:39 PM

I just got done doing my own muffler deletes, but I salvaged the stock tips and welded them onto the deletes! I hope to get more of these made and my supplier has tips that look like the stock ones. My idea is to sell them on the forum for cheap; if people show an interest.

nogoodname · 01-13-2013, 10:41 PM

I'd extend the ends/tips so that your bumper doesn't turn black or melts. Mine did lol.

Kingbaby · 01-14-2013, 08:53 AM

Or point them down

Videos ?

Big worm · 01-15-2013, 10:37 PM

as good of a DIY this is, you can simply do the "washer mod" and achieve the same effect without having advance auto pipes jutting out.

DEpointfive0 · 01-15-2013, 11:18 PM

I WANT YOUR TOW HITCH!!! Tell me how/where you got it from or mounted it to!!! Lol

ResIpsa · 01-16-2013, 08:36 AM

Quote:

Originally Posted by Big worm

as good of a DIY this is, you can simply do the "washer mod" and achieve the same effect without having advance auto pipes jutting out.

So you are suggesting that I modify my muffler delete DIY to include leaving in the muffler? Interesting…

A muffler delete mod that includes the muffler…try and wrap your head around that one…

And for god’s sake don’t you see what is popping out of my fog light opening? Yes, that is a trailer hitch receiver. Do you really think I care about what my pipes look like?

6spd · 01-16-2013, 01:22 PM

Quote:

Originally Posted by Big worm

as good of a DIY this is, you can simply do the "washer mod" and achieve the same effect without having advance auto pipes jutting out.

I did that for a few days. I liked it

m4a1mustang · 01-16-2013, 01:24 PM

Quote:

Originally Posted by ResIpsa

So you are suggesting that I modify my muffler delete DIY to include leaving in the muffler? Interesting…

A muffler delete mod that includes the muffler…try and wrap your head around that one…

And for god’s sake don’t you see what is popping out of my fog light opening? Yes, that is a trailer hitch receiver. Do you really think I care about what my pipes look like?

Not to mention you save a bit more weight this way.

Big worm · 01-16-2013, 01:56 PM

Quote:

Originally Posted by ResIpsa

So you are suggesting that I modify my muffler delete DIY to include leaving in the muffler? Interesting…

A muffler delete mod that includes the muffler…try and wrap your head around that one…

And for god’s sake don’t you see what is popping out of my fog light opening? Yes, that is a trailer hitch receiver. Do you really think I care about what my pipes look like?

i didnt mean any offense man, sorry if it came out that way. i meant it will sound the same is all..

Big worm · 01-16-2013, 01:57 PM

just in case other people see this and think its the only way, im letting them know that its not. they may actually care about what their pipes look like is all

ResIpsa · 01-16-2013, 06:23 PM

Quote:

Originally Posted by Big worm

i didnt mean any offense man, sorry if it came out that way. i meant it will sound the same is all..

No problems man. Even my wife says I have been a little short lately.

I have not had a track day since early November. I am like a junkie having the withdrawals.

Big worm · 01-18-2013, 12:25 AM

Quote:

Originally Posted by ResIpsa

No problems man. Even my wife says I have been a little short lately.

I have not had a track day since early November. I am like a junkie having the withdrawals.

lol! no worries. ive taken my z to a track here in orlando. granted it was just a 1/4 mile drag strip i still had a blast. i need to take it to a track with turns...

01-13-2013, 03:34 PM	#1 (permalink)
ResIpsa Track Member Join Date: Apr 2009 Location: Virginia Posts: 564 Drives: 09 RACING HEN Rep Power: 338	DIY Low $ Muffler Delete I originally devised this DIY as a low buck mod to improve the sound of my 370Z at the track. However, I think this could be used with anyone trying to develop any type of system intended to replace the stock muffler that does not have the ability to weld. WARNING: Anyone attempting this DIY should be prepared to deal with a sheared exhaust flange stud. Please, just assume that you will shear at least one stud in the process. If the stud shears while you are attempting to loosen it you will need to drill it out from the bottom. Make sure that you have a full set of sharp drill bits. Use a punch and create a notch as close to the center of the back of the stud as possible. Now put on some safety glasses and start drilling with a small bit until you get through the stud. Then just keep stepping up the size of the bits until you can insert a bolt to replace the stud. However, if the four exhaust flange nuts come off without shearing please apply ample amounts of anti-seize compound to the studs. In my humble opinion, the greatest aspect of this DIY is finding the Walker exhaust flange repair kit part # 36130. This completely opens up the possibility of developing a muffler delete that bolts directly to the flanges without the need for welding. They retail for $15 each at RockAuto and $20 at AutoZone. With this part, the sky is the limit. Feel free to use mandrel bends, glass packs, or whatever. Just use your imagination. As you see, my set up is the bare bones lowest $ setup. However, this is something that anyone can do with parts available at the local AutoZone. And the sound is insane! Initially, I attempted a setup that exited the car just as the stock exhaust did. However, this setup utilized flex pipe that I found to be a weak link. In the end, I just connected two sets of 45 degree angle pipe (again, available at any auto parts store). Keep in mind, that you should purchase your pipe from the same type of store as different stores pipes don't match up. This resulted in the end of the pipes angling down toward the exhaust cutouts in the bumper. Is this setup pretty? No. Although, when painted flat black the pipes are not very noticeable. In the end, you can create a set of muffler deletes for around $70 that can be swapped on and off in around 20 minutes (please apply plenty of anti-seize every time you un-bolt them). Who could hate on this? __________________ The Reed Law Firm; Michael Fasano VA Attorney and Counselor at Law: A Virginia Traffic, Criminal, and Family Lawyer.https://reedlawva.com/ Last edited by ResIpsa; 01-13-2013 at 04:53 PM.

01-13-2013, 03:55 PM	#2 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 417	Nice DIY -- also, that flange repair kit is pretty awesome! A great alternative to dealing with welding. __________________ Enjoy it. Destroy it.

01-13-2013, 06:27 PM	#3 (permalink)
CDepp Track Member Join Date: Nov 2012 Location: Charlotte, NC Posts: 837 Drives: sideways Rep Power: 13	I want to hear it! Get a video asap, please. nice DIY! __________________ -CDepp- 2011 MB Base+S M6 \| Invidia Exhaust \| TommyKairaHebiBeibi \| H&R Spacers 15/20 \| GTR Start \| 305hp/240tq

01-15-2013, 10:37 PM	#7 (permalink)
Big worm Base Member Join Date: May 2012 Location: Orlando, Florida Posts: 121 Drives: Blue dipped Z Rep Power: 12	as good of a DIY this is, you can simply do the "washer mod" and achieve the same effect without having advance auto pipes jutting out. DEpointfive0 likes this.

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01-13-2013, 10:39 PM	#4 (permalink)
scgolfer7 Base Member Join Date: Oct 2012 Location: Tulsa, OK Posts: 59 Drives: 09 Z Yellow 6MT Rep Power: 12	I just got done doing my own muffler deletes, but I salvaged the stock tips and welded them onto the deletes! I hope to get more of these made and my supplier has tips that look like the stock ones. My idea is to sell them on the forum for cheap; if people show an interest.

01-13-2013, 10:41 PM	#5 (permalink)
nogoodname Lifetime Premium Join Date: Nov 2008 Location: Montreal Posts: 22,357 Drives: E46 M3 Rep Power: 1764	I'd extend the ends/tips so that your bumper doesn't turn black or melts. Mine did lol.

01-15-2013, 11:18 PM	#8 (permalink)
DEpointfive0 Premium Member Bitches Join Date: Jan 2012 Location: SoCal Posts: 14,824 Drives: a lot Rep Power: 17151	I WANT YOUR TOW HITCH!!! Tell me how/where you got it from or mounted it to!!! Lol

01-16-2013, 01:57 PM	#13 (permalink)
Big worm Base Member Join Date: May 2012 Location: Orlando, Florida Posts: 121 Drives: Blue dipped Z Rep Power: 12	just in case other people see this and think its the only way, im letting them know that its not. they may actually care about what their pipes look like is all