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Old 03-13-2006, 11:07 PM   #1
the_poser
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Default Finally got my UP! But have DP question.

Well I finally got an uppipe today, mad props to WRXTuan
I am going to wait till I get my DP [hopefully next month to install it.
I have decided to go with either the Helix or Perrin.
My question is, will either of these DP's bolt up to the stock exhaust?
or am I going to have to get a large flange welded on there?
or just buy a CB?
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Old 03-13-2006, 11:40 PM   #2
23b_Rex
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the stock exh is 2.5"... the perrin is 3" iirc
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Old 03-13-2006, 11:45 PM   #3
the_poser
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"iirc"

???? sorry I'm such a n00b

I have been told that it will bolt up to the stock exhaust.
my plan is to get the DP, and then maybe by the end of the year get a CB [borla hush]. I was just wandering if I would run into fitiment issues
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Old 03-13-2006, 11:49 PM   #4
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iirc = if i remember (or recall) correctly

if perrin told you it will bolt up then it will... it's always possible there will be fitment issues

just make sure both are the same diameter and bolt holes will match up (i.e. if one is a donut shapped and the other is square.. you'll have issues).

even if they're not the same diameter you can always get adaptors, but be aware that exhaust gases travelling through a 3" pipe and have to be squeezed down to 2.5" aren't going to be advantageous for performance
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Old 03-13-2006, 11:51 PM   #5
the_poser
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Quote:
even if they're not the same diameter you can always get adaptors, but be aware that exhaust gases travelling through a 3" pipe and have to be squeezed down to 2.5" aren't going to be advantageous for performance
yea I know but it would only be for a few months.
I'll look into those adaptors
thanks
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Old 03-14-2006, 12:04 AM   #6
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Bah, the old "bottleneck wont make power" Bullspit. Youll will gain a
DEFINATE amount of power despite the stock exhaust. yes, you are going to a smaller diameter but you are still letting the exhaust breathe much more with the aftermarket up/dp. a cat back will only net another 5-8 hp, nothing huge. Youll love it after the up/dp and will definately notice it

As for the DP mating up, most aftermarket downpipes, like the helix, have flat flanges and creates a gap because the stock exhaust is a donut flange. in order to mate them and not leak is just triple up the gasket in between or get a donut gasket. thats it. good luck

-Chris
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Old 03-14-2006, 12:06 AM   #7
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I'll be honest, the main reason I want the DP/UP is performance, and the main reason I want the CB is the uber cool exhaust note subbys have
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Old 03-14-2006, 12:17 AM   #8
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I had a helix catted dp mated to the stock exhaust and it bolted up just fine. Just make sure you use a triple layer gasket to seal up. I just got a borla hush last week to complete the turboback, and man i love that power.
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Old 03-14-2006, 12:19 AM   #9
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Quote:
Originally Posted by MachinesWRX
Bah, the old "bottleneck wont make power" Bullspit. Youll will gain a DEFINATE amount of power despite the stock exhaust.
of course, but i was speaking about his entire aftermarket tbe.. if the perrin to borla was a 3" to 2.5"... not going to take power away but not going to make the power it could with an exhaust of uniform diameter

anything is better than stock...
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Old 03-14-2006, 12:54 AM   #10
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my stock CB will bolt up to the 3" DP right?
and I think the borla hush is 3" all the way but it comes with the ruducer to 2.5" to fit up to the stock DP. I found a 3" flange for the borla if you have a 3" DP
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Old 03-14-2006, 11:55 AM   #11
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Ive got the helix up and dp, the dp mated perfectly to the stock catback, and yes you can deff notice the power increase.
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Old 03-14-2006, 02:20 PM   #12
the_poser
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Quote:
and yes you can deff notice the power increase.
sweet! I can't wait till i get my DP.

here's what I'm considering...
UP
DP [most likely helix]
CB [borla hush]
nd then get my EcuTek rrflashed to stage 2.
what I can't decide on is do I want a short ram [the K&N typhoon] or just a K&N drop in and do the silencer deleat?
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Old 03-14-2006, 02:47 PM   #13
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Quote:
Originally Posted by the_poser
sweet! I can't wait till i get my DP.

here's what I'm considering...
UP
DP [most likely helix]
CB [borla hush]
nd then get my EcuTek rrflashed to stage 2.
what I can't decide on is do I want a short ram [the K&N typhoon] or just a K&N drop in and do the silencer deleat?
A lot of people will tell you not to do the short ram or typhoon and just do the drop in or delete. I personally did the drop in and silencer delete. Check out Unabombers Manifesto for more info, it's really good and explains it all: http://forums.nasioc.com/forums/showthread.php?t=533787
This will really help.
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Old 03-14-2006, 06:56 PM   #14
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thanks!
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Old 03-14-2006, 08:59 PM   #15
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Quote:
Originally Posted by the_poser
here's what I'm considering...
UP
DP [most likely helix]
CB [borla hush]
nd then get my EcuTek rrflashed to stage 2.
what I can't decide on is do I want a short ram [the K&N typhoon] or just a K&N drop in and do the silencer deleat?
Congrats on your plan, I would do everything you have in that plan, and just do a drop in and silencer delete (won't take you more than 10 mins for that) Plain and simple.

T.Vo
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