X-Pipes ?

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16 Nov 2012 06:11 #12577 by PCA0891
X-Pipes ? was created by PCA0891
Morning All
I am about to send my 88 S4 Auto up to Austin for a complete Intake Refresh and while doing so he will be installing a new X-Pipe.
Having said that.
Are there differences in X-pipes from vendor to vendor. Or are they all basically the same?
In Tn we are required to have Cats. However, I have heard that some people actually hollow out there cats to get by. In doing so would that improve HP? I was told that my car would smell like rotten egg's? What are your thoughts?
Or should I just keep the factory cats in that they have 75K on them.
Lastly, performance cats????

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16 Nov 2012 06:23 #12578 by the flying scotsman
Replied by the flying scotsman on topic X-Pipes ?
adding an X pipe is a significant power increase to your car. The pipe to have was created by Louis Ott then perfected by Dave Lomas of motorsports in Utah. After significant trial and error and much dyno time the Xpipe thats available today is a bolt on 30hp pipe........928sRus sells them.

Buy the performance cats and remove all the OEM air pump and plumbing.

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16 Nov 2012 12:58 #12579 by Kiln_Red
Replied by Kiln_Red on topic X-Pipes ?
Found a link for you, Robert. I have taken cars through emissions without the smog pump and passed, but it should be noted that if you're caught then the result will be an automatic fail.

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16 Nov 2012 17:02 #12580 by the flying scotsman
Replied by the flying scotsman on topic X-Pipes ?
please note the attched link is not the same Motorsports I referenced.

I just bought an X pipe for the GTS with hi-perf cats........ships direct from Utah

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16 Nov 2012 17:36 #12581 by Kiln_Red
Replied by Kiln_Red on topic X-Pipes ?
Correct. I apologize if there was any confusion. Just pointing out one option.

please note the attched link is not the same Motorsports I referenced.

I just bought an X pipe for the GTS with hi-perf cats........ships direct from Utah

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17 Nov 2012 06:18 #12583 by the flying scotsman
Replied by the flying scotsman on topic X-Pipes ?
no worries Austin........just want to be clear for the OP

Another part of the X pipe discussion is what to use after the X. On my S4 I have the small/GT type resonators that when fitted with an X pipe/sans cats and a RMB was too loud.........set off car alarms when decellerating in the city. I swapped out the RMB to the OEM rear muffler but that was too quiet so went with a GT rear muffler.......perfect :)

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27 Nov 2012 15:28 #12676 by rxhadden
Replied by rxhadden on topic X-Pipes ?
Looks like you are moving in the same direction as I. Planning an intake refresh and considering x-pipes. Was going to attempt the refresh myself using Dwaynes excellent guide, however might go your route. Who in Austin is doing and about how much is the cost with parts/labor. thanks, r

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27 Nov 2012 15:33 #12677 by rxhadden
Replied by rxhadden on topic X-Pipes ?
Sent you a PM with the same in case you rather repy there.

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27 Nov 2012 22:13 #12683 by Kiln_Red
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Who in Austin is doing and about how much is the cost with parts/labor. thanks, r


He's not sending the car to Austin, TX. He's sending it to Austin Embry; an individual. ;)

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28 Nov 2012 08:38 #12692 by the flying scotsman
Replied by the flying scotsman on topic X-Pipes ?
I just received my X pipe that shall be installed on the GTS.

attached pic should give OP some answers:

Attached files [img]media/attachments/13048=1490-001.jpg[/img]

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28 Nov 2012 13:39 #12700 by Mike Frye
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I just received my X pipe that shall be installed on the GTS.

attached pic should give OP some answers:


or make his pants fit differently. :D

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28 Nov 2012 23:09 #12706 by 928mac
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Malcolm those are sweet.

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29 Nov 2012 18:09 #12715 by rxhadden
Replied by rxhadden on topic X-Pipes ?
got it on the Austin issue:D....one thing I did not see clarified on this thread was whether or not Roger's intake kit added HP....any thoughts? thanks guys, Randy

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30 Nov 2012 11:00 #12729 by xstepson
Replied by xstepson on topic X-Pipes ?
RxHadden,
If by intake system, you are speaking of the EIS, I was at the dyno session when the dynos were run pre and post installation of the EIS. The dyno showed about 10 rwhp gain with the EIS. I'm not sure if Roger is making any claim about any increased HP, but I was there and saw it myself.

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30 Nov 2012 17:40 #12731 by pcar928fan
Replied by pcar928fan on topic X-Pipes ?
Malcolm, you will love them!

James
78 Silver / Black-white #295
84 Ruby Red / Black AO84
88 Dark Blue / Linen-Black
92 Polar Silver / Dark Blue 92EURO
93 Arrow Blue / Black

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30 Nov 2012 17:48 #12732 by the flying scotsman
Replied by the flying scotsman on topic X-Pipes ?
I actually installed my first Xpipe on my S4 way back when Motorsports first developed them and Dave was shipping direct. I then was involved in much experimentation with the cat back system/resonators/rear muffler and RMB.

This latest system is for my GTS that is completely stock but not for long :)

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03 Dec 2012 10:34 #12739 by emmanuelli
Replied by emmanuelli on topic X-Pipes ?

no worries Austin........just want to be clear for the OP

Another part of the X pipe discussion is what to use after the X. On my S4 I have the small/GT type resonators that when fitted with an X pipe/sans cats and a RMB was too loud.........set off car alarms when decellerating in the city. I swapped out the RMB to the OEM rear muffler but that was too quiet so went with a GT rear muffler.......perfect :)


funny, my car sets off alarms everywhere and its stock. not even loud, at least compared to other V8's in the neighborhood. i'll be looking into xpipes next year though.

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