Out of complete boredom and lack of funds, I decided to "upgrade" my exhaust system using the OEM muffler for stealth and for cost. I purchased a used 98 civic muffler from a dismantler on Alpha street in Irwindale (Amazing source for parts!!!)
and hacked it up.

Step 1: The Victim, $25 from a dismantler



Step 2: The cut off tool I bought from Harbor Freight $9.99



Step 3: The Heatshield removed



Step 4: Honda's muffling



Step 5: Gutted



Step 6: Weld the cover back on (no pics)

This took longer than I thought because the muffler case is very thin and hard to weld even on the lower settings, the torch likes to burn through instead of weld. I left the muffler empty but I would have rather ran a drilled straight pipe through it with some sort of muffler packing. Anyhow, it sounds pretty much like a flowmaster sounds like on a Honda. It does have the G35 sound on deceleration. It probly only added .5-2 hp but it killed some time. Let me know what ya'll think.

 

pics working???

 

Sound clip?

 

aftermarket mufflers run straight right? never really opened one

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eL &raquo;</TD></TR><TR><TD CLASS="quote">Sound clip?</TD></TR></TABLE>

sound clip or ban

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00mofo &raquo;</TD></TR><TR><TD CLASS="quote">

sound clip or ban </TD></TR></TABLE>

+1 for ban.

 

It sounds like what you think it will.....no change at idle, a little hum at cruise, and it sounds like a G35 at WOT. It definitely has that Infiniti hollow sound. this is on a Y7 with header and catless stock B pipe.

 

I dropp him to 45% with no Sound clip!

 

For the money it costed you to do that you could've bought a dynomax super turbo or cherry bomb turbo performance muffler, and they both look stock as well.

 

Hmmm maybe Ill try that while my car is on jackstands....What else could I seal the muffler with besides welding it???

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by _Spugen_ &raquo;</TD></TR><TR><TD CLASS="quote">Hmmm maybe Ill try that while my car is on jackstands....What else could I seal the muffler with besides welding it???</TD></TR></TABLE>

Duct tape and super glue.

 

lol awesome Imma do that!

 

JB Weld. I swear, if they just had some of that on the Titanic. =\

 

This is the most un-intelligent thing I have ever seen any one do. It ranks right up there with the dryer pipe cold air intake and flex pipe exhaust. If you have ever seen an inside of a flowmaster muffler you would realize that it is just that a muffler!!!! they have chambers and are not just a hollow CAN!!! I bet your creation sounds like ****!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hammer2226 &raquo;</TD></TR><TR><TD CLASS="quote">This is the most un-intelligent thing I have ever seen any one do. It ranks right up there with the dryer pipe cold air intake and flex pipe exhaust. If you have ever seen an inside of a flowmaster muffler you would realize that it is just that a muffler!!!! they have chambers and are not just a hollow CAN!!! I bet your creation sounds like ****! </TD></TR></TABLE>

Best newbie response ever, because hes right!

Why even bother, you might as well have just cut the pipe before the muffler and left it that way. Or just dont even bother bolting up your axle-back at all.

 

I rather remove the muffler and weld a straight pipe out back from where you cut the muffler. $10 and be done with it. Same exhaust tone.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jlacoy82 &raquo;</TD></TR><TR><TD CLASS="quote">

Best newbie response ever, because hes right!

.</TD></TR></TABLE>
i have seen people do something similar to this,but much better thought out.cut open and gut the muffler,add a perforated core from the inlet to outlet,repack muffler body with sound deadening material,then seal muffler back up.that would allow for a true stright thru muffler,with actual cound deadening proerties,and still look stock.
what you've created is basically uselesss.the exhaust gas will lose all velocity and direction once it gets inside that huge,empty can.there's also no way it sounds like stock at idle-you've got a straight pipe,nothing more.it has no sound damping properties at all.
chris

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TeamNextGenChris &raquo;</TD></TR><TR><TD CLASS="quote">
i have seen people do something similar to this,but much better thought out.cut open and gut the muffler,add a perforated core from the inlet to outlet,repack muffler body with sound deadening material,then seal muffler back up.that would allow for a true stright thru muffler,with actual cound deadening proerties,and still look stock.
what you've created is basically uselesss.the exhaust gas will lose all velocity and direction once it gets inside that huge,empty can.there's also no way it sounds like stock at idle-you've got a straight pipe,nothing more.it has no sound damping properties at all.
chris</TD></TR></TABLE>
It's possible it still sounds close to stock at idle. The muffler will still act somewhat as a resonator. But your completely right that the expelled gases will just bounce around inside the empty muffler and flow like absolute ****. He should've at least welded a peice of piping through the inside from the inlet to the outlet so it had something helping to direct the flow.

 

thats some redneck **** , damn

 

i say use it as a flower pot..

 

I ran without a muffler for about 300 miles because the stocker finally gave in. Did I take the opportunity to upgrade my exhaust? Hell no: my car's slow and it'll be slow with or without a loud, annoying exhaust, so I had the squishiest, quietest, heaviest ************ welded on there and it sounds AMAZING.

And by amazing I mean silent.

Some of you children haven't yet realized the benefit to having a quiet, stockish car. That redneck Flowmaster might seem like a good idea to you now - and I must admit the fabrication is pretty worthy - but cruising at 3,000rpm on the highway's gunna make you want to put a knife in your eye.

 

I ran with my cat hangin off for 2 months... I hated it, but it was bearable (same as my 67 fbird with real flowmasters). I had to run it a day with just the apexi WS2 resonator, my god that sounded hot.

Do youself a favor and pack that can. Even if it's just a few layers of fiberglass screwed to the walls, it'll sound better.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Archidictus &raquo;</TD></TR><TR><TD CLASS="quote"> - but cruising at 3,000rpm on the highway's gunna make you want to put a knife in your eye.</TD></TR></TABLE>

haha. I think I give you to many props but that sh*ts funny.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hammer2226 &raquo;</TD></TR><TR><TD CLASS="quote">This is the most un-intelligent thing I have ever seen any one do. It ranks right up there with the dryer pipe cold air intake and flex pipe exhaust. If you have ever seen an inside of a flowmaster muffler you would realize that it is just that a muffler!!!! they have chambers and are not just a hollow CAN!!! I bet your creation sounds like ****! </TD></TR></TABLE>
for the noob but he is right nice try but that will flow like crap! if you welded a pipe connecting the inlet to the outlet like some of the others said it might be a different story! but i guess if you like it that is all that matters!

 

Damn, I can feel the love.

I started this project because I was curious about what Honda used inside the OEM muffler since I've never seen anyone cut one open. I kinda just kept going from there. Maybe you guys could just be thankful for someone going through the trouble of posting all this up so you can see how restrictive the OEM muffler is, and not be such ********?