Downpipes and stock tune (with or without spacers)

turnsignalslol · 08-04-2024, 02:45 PM

I'm planning on getting downpipes for my car for the extra sound but I'm wondering if its fine to do with a stock tune. I've also heard that the secondary o2 sensors on the S58 play a part in calculating fuel trims so its best to run no spacers if going catless. Any help would be appreciated, thanks

Info@mad-us.com · 08-05-2024, 10:12 AM

Quote:

Originally Posted by turnsignalslol

I'm planning on getting downpipes for my car for the extra sound but I'm wondering if its fine to do with a stock tune. I've also heard that the secondary o2 sensors on the S58 play a part in calculating fuel trims so its best to run no spacers if going catless. Any help would be appreciated, thanks

When running catless it doesn't seem to be much of an issue using spacers. With catted downpipes and to long of a spacer some do get a code for delayed response code. If you get that code I would attempt another fix or just run with the light.

mike@x-ph.com · 08-05-2024, 01:39 PM

You can run catless or catted, no harm done to the engine. you just have to live with the check engine light

Info@mad-us.com · 08-06-2024, 02:45 PM

Customer sent me this and says its been working well. https://www.leib-engineering.de/leib...-m3-g80-g81-en

Geighty7 · 08-06-2024, 04:20 PM

Quote:

Originally Posted by turnsignalslol

I'm planning on getting downpipes for my car for the extra sound but I'm wondering if its fine to do with a stock tune. I've also heard that the secondary o2 sensors on the S58 play a part in calculating fuel trims so its best to run no spacers if going catless. Any help would be appreciated, thanks

Why not just do a catback instead? Makes no sense to run downs without a tune just for sound and an annoying CEL…

turnsignalslol · 08-06-2024, 04:35 PM

Quote:

Originally Posted by Geighty7

Why not just do a catback instead? Makes no sense to run downs without a tune just for sound and an annoying CEL…

Already have a full exhaust system, I just love how my friends’ catless G8xs sound

Geighty7 · 08-06-2024, 06:21 PM

Quote:

Originally Posted by turnsignalslol

Already have a full exhaust system, I just love how my friends’ catless G8xs sound

Understandable

97supratt · 08-29-2024, 11:08 AM

I have a racechip, will catless downpipes add that much power?

mike@x-ph.com · 08-29-2024, 01:01 PM

Quote:

Originally Posted by 97supratt

I have a racechip, will catless downpipes add that much power?

~ 10/15 more

08-04-2024, 02:45 PM	#1
turnsignalslol Captain 387 Rep 739 Posts Drives: '24 G87 M2 Join Date: Feb 2022 Location: SoCal iTrader: (0)	Downpipes and stock tune (with or without spacers) I'm planning on getting downpipes for my car for the extra sound but I'm wondering if its fine to do with a stock tune. I've also heard that the secondary o2 sensors on the S58 play a part in calculating fuel trims so its best to run no spacers if going catless. Any help would be appreciated, thanks __________________ Current: 2024 G87 M2 (ZF8) Past: 2022 330i RWD 2020 M2 Competition DCT
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08-05-2024, 01:39 PM	#3
mike@x-ph.com Joint Chiefs of Staff 27836 Rep 197,574 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	You can run catless or catted, no harm done to the engine. you just have to live with the check engine light __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
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08-06-2024, 02:45 PM	#4
Info@mad-us.com Major General 3355 Rep 6,817 Posts Drives: bmw Join Date: Mar 2021 Location: Mad-us.com iTrader: (0)	Customer sent me this and says its been working well. https://www.leib-engineering.de/leib...-m3-g80-g81-en __________________ - Click Here Performance Parts For Your Bmw At Crazy Low Prices! 5% OFF Code "BimmerPost" Email: info@mad-us.com
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08-29-2024, 11:08 AM	#8
97supratt First Lieutenant 163 Rep 360 Posts Drives: BMW, Toyota, porsche Join Date: Oct 2017 Location: La crescenta CA iTrader: (6)	I have a racechip, will catless downpipes add that much power?
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