SS header install question (CATLESS)

NicholsE46 · Mon, Apr-06-2009, 05:37:19 PM

I searched and found miky DIY with CSL headers with CSL cats.... need to know about the o2 sensor wiring if im running catless ? ..... does anyone know a DIY for the wiring if running catless??

if anyone can please help out I would greatly appreciate it... about to do the install myself if I can get this info... thanks

///GRAM · Mon, Apr-06-2009, 05:55:21 PM

send the member tonester a PM...He should be able to answer your question.

NicholsE46 · Mon, Apr-06-2009, 05:56:35 PM

thanks.... .ill do that!

Choco · Mon, Apr-06-2009, 08:13:14 PM

You need the pre cat O2 sensors and the EGT sensor install to the headers in order to get the car run properly. The post cat O2 sensors can be remove since you are running catless, it will be pretty much useless. But you will get a engine light unless you are getting software to bypass the post cat O2 sensor. Just lable the sensors to (Front pre cat; Rear pre cat; Front post cat; Rear post cat) and don't mix them up

Mon, Apr-06-2009, 05:37:19 PM	#1
NicholsE46 Registered User Join Date: Feb 2004 Posts: 638 Reputation: 0	SS header install question (CATLESS) I searched and found miky DIY with CSL headers with CSL cats.... need to know about the o2 sensor wiring if im running catless ? ..... does anyone know a DIY for the wiring if running catless?? if anyone can please help out I would greatly appreciate it... about to do the install myself if I can get this info... thanks

Mon, Apr-06-2009, 05:55:21 PM	#2
///GRAM Dank Join Date: Mar 2008 Age: 20 Posts: 3,474 Reputation: 0 Location: 310	send the member tonester a PM...He should be able to answer your question. __________________ -2002 Jet black m3 Journal w/ full mod list(SOLD) -2006 GSXR 600 *Pictures(SOLD) -2008 Ducati 848 Pictures*

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Mon, Apr-06-2009, 05:56:35 PM	#3
NicholsE46 Registered User Join Date: Feb 2004 Posts: 638 Reputation: 0	thanks.... .ill do that!

Mon, Apr-06-2009, 08:13:14 PM	#4
Choco Registered User Join Date: Oct 2002 Posts: 297 In the garage: '11 BMW X6M '09 BMW 335 '01 BMW M3 Reputation: 0 Location: Canada	You need the pre cat O2 sensors and the EGT sensor install to the headers in order to get the car run properly. The post cat O2 sensors can be remove since you are running catless, it will be pretty much useless. But you will get a engine light unless you are getting software to bypass the post cat O2 sensor. Just lable the sensors to (Front pre cat; Rear pre cat; Front post cat; Rear post cat) and don't mix them up