Poor Mans Bypass Pipes
11-03-2010, 06:06 PM
#1
Drifting
Thread Starter
Poor Mans Bypass Pipes
So I was bored today, stopped by one of my favorite exhaust shops about the wife's car and ended up spending money instead.
So I figure all the existing muffler pipe isn't mandrel bent or stainless steel. So why bother with 900 dollar pipes just for that section.
Made them so they can bolt off and stainless steel, which cost me an extra 50 bux, but had to butcher the existing 2nd set of cats a little (can be fixed with welding) I used the existing flange and hanger locations and part of the pipe, just cut out the old ones to make it easy.
In the past there have been times I wanted bolt outs
$299 plus tax and 1 hour later, I am sure they don't flow as good at the 900 dollar set but it is good enough for me! Little more throaty, have not had a chance to go on the highway and check the butt dyno, but I don't expect much.
Thoughts? You can't see in the pics, but the clamp is still there to detach the stock muffler.
So I figure all the existing muffler pipe isn't mandrel bent or stainless steel. So why bother with 900 dollar pipes just for that section.
Made them so they can bolt off and stainless steel, which cost me an extra 50 bux, but had to butcher the existing 2nd set of cats a little (can be fixed with welding) I used the existing flange and hanger locations and part of the pipe, just cut out the old ones to make it easy.
In the past there have been times I wanted bolt outs
$299 plus tax and 1 hour later, I am sure they don't flow as good at the 900 dollar set but it is good enough for me! Little more throaty, have not had a chance to go on the highway and check the butt dyno, but I don't expect much.
Thoughts? You can't see in the pics, but the clamp is still there to detach the stock muffler.
Last edited by touareg; 11-03-2010 at 09:35 PM.
11-04-2010, 12:14 AM
#2
Nordschleife Master
looks ok, sort of like my "gundo hack" on 997...
one thing that bothers me on the cayenne is the only "hack" to be done is to remove the cat's... which doesnt sit right with me (Porsche has noted it numerous times over the year that past the cats=ok, messing with the cat's or anything before=not ok.)
im curious if anyone has attempted a "gundo hack" on the Cayenne, i know the inlet pipes for the rear muffler are in the middle and outlets on the side... but a pip between them would not invalidate warranty and also add a nice throatyness on the exhaust i would feel (acts like PSE on my 911's... high pressure (full throttle) it half bypasses the muffler and sounds sexy... low pressure (half or less throttle) it goes thru the muffler mostly and sounds better but not loud.
like this:
-riley
one thing that bothers me on the cayenne is the only "hack" to be done is to remove the cat's... which doesnt sit right with me (Porsche has noted it numerous times over the year that past the cats=ok, messing with the cat's or anything before=not ok.)
im curious if anyone has attempted a "gundo hack" on the Cayenne, i know the inlet pipes for the rear muffler are in the middle and outlets on the side... but a pip between them would not invalidate warranty and also add a nice throatyness on the exhaust i would feel (acts like PSE on my 911's... high pressure (full throttle) it half bypasses the muffler and sounds sexy... low pressure (half or less throttle) it goes thru the muffler mostly and sounds better but not loud.
like this:
-riley
11-04-2010, 01:16 AM
#3
Drifting
Thread Starter
looks ok, sort of like my "gundo hack" on 997...
one thing that bothers me on the cayenne is the only "hack" to be done is to remove the cat's... which doesnt sit right with me (Porsche has noted it numerous times over the year that past the cats=ok, messing with the cat's or anything before=not ok.)
im curious if anyone has attempted a "gundo hack" on the Cayenne, i know the inlet pipes for the rear muffler are in the middle and outlets on the side... but a pip between them would not invalidate warranty and also add a nice throatyness on the exhaust i would feel (acts like PSE on my 911's... high pressure (full throttle) it half bypasses the muffler and sounds sexy... low pressure (half or less throttle) it goes thru the muffler mostly and sounds better but not loud.
like this:
-riley
one thing that bothers me on the cayenne is the only "hack" to be done is to remove the cat's... which doesnt sit right with me (Porsche has noted it numerous times over the year that past the cats=ok, messing with the cat's or anything before=not ok.)
im curious if anyone has attempted a "gundo hack" on the Cayenne, i know the inlet pipes for the rear muffler are in the middle and outlets on the side... but a pip between them would not invalidate warranty and also add a nice throatyness on the exhaust i would feel (acts like PSE on my 911's... high pressure (full throttle) it half bypasses the muffler and sounds sexy... low pressure (half or less throttle) it goes thru the muffler mostly and sounds better but not loud.
like this:
-riley
11-04-2010, 03:23 AM
#4
Nordschleife Master
i just noticed the tips bolt on the center muffler, so this would make the tips permanent... Hmmmmm....
11-04-2010, 01:23 PM
#5
Drifting
Thread Starter
i have a shop local that did both my 997's with the hack, was curious if anyone has done it on cayenne and if sounds any good or like crap.. i really didnt want to affect my warranty with the cat delete on an 11'.... on the carrera just the hack made it sound amazing.
i just noticed the tips bolt on the center muffler, so this would make the tips permanent... Hmmmmm....
i just noticed the tips bolt on the center muffler, so this would make the tips permanent... Hmmmmm....
http://cgi.ebay.com/ebaymotors/ws/eB...m=350170285942
http://cgi.ebay.com/ebaymotors/PORSC...item5187c68776
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11-04-2010, 06:59 PM
#9
Nordschleife Master
Doesn't answer your question, but this is it, looks like the tips are left alone.
http://cgi.ebay.com/ebaymotors/ws/eB...m=350170285942
http://cgi.ebay.com/ebaymotors/PORSC...item5187c68776
http://cgi.ebay.com/ebaymotors/ws/eB...m=350170285942
http://cgi.ebay.com/ebaymotors/PORSC...item5187c68776
the Cat "Hack" sounds great, ive heard it before but im just worried about warranty, hence my hack desire... sorry to hijack your thread at all. i apologize.
11-04-2010, 07:01 PM
#10
Nordschleife Master
your mention about rear muffler has me curious, i wonder if anyone has done it and sound results (above gentleman mentions a hack, unsure if he means the Cat "hack" or the muffler "hack" however
11-04-2010, 07:06 PM
#11
Moderator !x4
One hack is to take out the contents of the secondary cat, I know someone who went straight pipes from the primary cats back with only 1 Audi glass pack per side
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awahl63 (09-10-2021)
11-04-2010, 10:19 PM
#13
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If it isn't as loud as what my computer is making it out to be (...like NASCAR loud) then I'm sure it sounds great! Love that you can hear the Turbo's as well. Definitely in my near future.
11-04-2010, 10:32 PM
#14
Addict
Rennlist Member
Rennlist Member
It is more like a motorsport package like sound. It is not for the meek who want to remain stealth, but it is not crazy loud like fabspeeds on a 993.
11-04-2010, 10:47 PM
#15
Nordschleife Master
Not much light here after work these days. Did this in a hurry.
http://www.youtube.com/watch?v=TGwHtEYFhDw
http://www.youtube.com/watch?v=TGwHtEYFhDw
this is cat removal or muffler hack?