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warrenbrown · 03-31-2016, 02:24 AM

I'm sorry I forgot that they use dual cats and 2 pre and post cat sensors. I have way too many M42 and M44 cars. I wasn't focused on that detail.
I think you now have 1 pre cat port and 2 post. The ECU is looking for 2 signals pre cat so it can make adjustments to bank 1 and bank 2. I think you will need both post cat ports because the ECU needs to verify the the cat is doing its job for bank 1 and 2.
By now you can try it out and see what works or doesn't. It is unclear to me how it will react to a single cat with the sensors in the same exhaust stream.
Good Luck
Warren

03-31-2016, 02:24 AM	#12
warrenbrown Junior Member Join Date: Jun 2014 Location: New Jersey USA Posts: 5 iTrader: (0) Photo Gallery	I'm sorry I forgot that they use dual cats and 2 pre and post cat sensors. I have way too many M42 and M44 cars. I wasn't focused on that detail. I think you now have 1 pre cat port and 2 post. The ECU is looking for 2 signals pre cat so it can make adjustments to bank 1 and bank 2. I think you will need both post cat ports because the ECU needs to verify the the cat is doing its job for bank 1 and 2. By now you can try it out and see what works or doesn't. It is unclear to me how it will react to a single cat with the sensors in the same exhaust stream. Good Luck Warren