Injen CAI w/out Performance Exhaust??

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Old 05-20-2007, 10:49 AM
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Injen CAI w/out Performance Exhaust??

I'm thinking of buying an '04 TSX that currently has an Injen CAI and performance exhaust system. I'm wondering if I buy this car, can I remove the exhaust pipes since I prefer the look of the factory tips. I realize the larger exhaust pipes might give the car slightly better performance, but the external looks of the car are more of a priority for me.

So I just want to make sure that I wouldn't be doing any harm by going back to the factory exhaust while having the CAI.

Also, would this be hard to do? Is it as simple as removing the performance exhaust or is it a complex process?

Thank you!
Old 05-20-2007, 11:30 AM
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No problem with going back to factory exhaust. Find someone in your area to do a trade. The install is relatively easy if the mounting nuts are not rusted badly.
Old 05-20-2007, 11:43 AM
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Thank you. Does the CAI increase the chances of having any engine troubles down the road?

If I replace the exhaust (go back to the factory system), will the engine note sound like it would if I never had the performance exhaust (does the more guttural sound come from the performance exhaust or the CAI)?
Old 05-20-2007, 11:49 AM
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CAI wont hurt the engine without exhaust. But the gutteral sound you are talking about comes from both. The injen CAI is pretty loud at WOT, but under typical driving conditions you wont even know it's there
Old 05-20-2007, 11:53 AM
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It depends on which performance exhaust is currently on the car and if it's louder than the CAI or not. Reinstalling the stock exhaust will definitely shift the sound to the front as the CAI makes louder sound >3000 rpm or so.
Old 05-20-2007, 03:53 PM
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Aftermarket cat-backs do pretty much diddly squat for a TSX as far as horsepower. But, it depends on which one it is. The comptech exhaust system I think looks and sounds nice for instance without looking and sounding too boy-racerish. It wont hurt anything to go back to the OEM system.

As for the CAI, it will add a few more hp but make alot more noise. High flow air filters tend not filter out dust as well either as the stock airbox with OEM paper filter. This could to higher levels of engine wear in the long run.

If you're conscious enough to be concerned about this kind of stuff, then probably you're better off looking for a completely stock TSX.
Old 05-20-2007, 05:01 PM
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Originally Posted by Brandon24pdx
As for the CAI, it will add a few more hp but make alot more noise. High flow air filters tend not filter out dust as well either as the stock airbox with OEM paper filter. This could to higher levels of engine wear in the long run.
Until recently filtration tests were performed in accordance with the Society of Automotive Engineer's (SAE) J726 testing procedure, however, we now use the ISO 5011procedure which that superseded the SAE procedure.

The content of the test dust used in accordance with the SAE testing procedure is as follows:

Particle Size in Microns ----------> % by Volume (+/- 3%)
<5.5 ------------------------ 13
5.5 to 11 ------------------------ 11
11 to 22 ------------------------ 13
22 to 44 ------------------------- 19
44 to 88 ------------------------- 28
88 to 176 ------------------------ 16

Our testing has demonstrated that on average, K&N air filters have an overall efficiency rating of between 97 and 99%.
Not meant to be an ad...but high flow air filters (if you get a good quality one) do an excellent job of filtering. Paper filters suck.
Old 05-20-2007, 08:40 PM
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Originally Posted by INeedACold1
Not meant to be an ad...but high flow air filters (if you get a good quality one) do an excellent job of filtering. Paper filters suck.
Paper filters filter even better than high flow air filters.
Old 05-21-2007, 10:20 AM
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Thanks guys. Brandon, I think you're dead on. I'm better off sticking with a stock TSX.
Old 05-21-2007, 01:35 PM
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Actually, you can get the modded one and just do a trade with a forum member. You might even be able to get an OEM exhaust plus a little cash in exchange for your aftermarket exhaust. What area do you live in?
Old 05-21-2007, 02:29 PM
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Which exaust does the car have now? Which brand?
Old 05-21-2007, 05:31 PM
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Originally Posted by Tsx536
Actually, you can get the modded one and just do a trade with a forum member. You might even be able to get an OEM exhaust plus a little cash in exchange for your aftermarket exhaust. What area do you live in?
That's what I would do if I were you
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