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GS - 2nd Gen (1998-2005) Discussion about the second generation GS300, GS400 and GS430 (1998 - 2005)

Modding help

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Old Oct 26, 2012 | 11:45 AM
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Default Modding help

I am in the process of getting a intake (and extend it to where my bumper is), a apexi a/f controller, header, and a custom exhaust (after the cats). I have a couple of question so I hope you guys can help me.
1. Is it better if I get a k&n intake and pair it with a a/f controller or a srt intake with the piggyback ecu. The only difference is that the srt intake has a bigger pipe and that you can tune more than just your intake.
2. Which one is the best for the money? Apexi safc, safc2, or neo?
3. If I get the intake and headers. What size exhaust would give me the best overall performance? 2.5" or 3" piping?
This will really help with my project. I have a gs400. Thanks in advance.

Last edited by 818GS; Oct 26, 2012 at 11:50 AM.
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Old Oct 26, 2012 | 11:46 AM
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What car do u have? 300 or 400/430?
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Old Oct 26, 2012 | 11:53 AM
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Originally Posted by 1sWt2GS
What car do u have? 300 or 400/430?
I have a gs400
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Old Oct 26, 2012 | 12:02 PM
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I would do an intake and a neo.. you can customize the neo's tune foe add on's later. The SRT ECU is locked.
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Old Oct 27, 2012 | 01:49 AM
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Originally Posted by GSJake
I would do an intake and a neo.. you can customize the neo's tune foe add on's later. The SRT ECU is locked.
yah but i heard the srt has a bigger pipe and that helps a lot.
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Old Oct 27, 2012 | 05:32 AM
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Originally Posted by 818GS
yah but i heard the srt has a bigger pipe and that helps a lot.
yes it does help but, i think we should keep it at 2.5.
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Old Oct 28, 2012 | 12:18 AM
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Originally Posted by neegroy
yes it does help but, i think we should keep it at 2.5.
I was talking about the intake pipe and not the exhaust but anyway a 2.5" exhaust will give me better overall performance.
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Old Oct 28, 2012 | 02:53 PM
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does anyone have the neo? would you recommend it?
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Old Oct 29, 2012 | 11:12 PM
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Anyone else have any input? Also, does anyone know of a good exhaust shop in socal to have my custom exhaust done? Thanks
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