Anyone making a secondary cat delete ?

onfireX5 · 04-03-2018, 12:32 PM

I know the primary cat deletes are out. Secondary delete ?

onfireX5 · 04-03-2018, 01:00 PM

This guy. One on each side. No 02’s after to check on it so deleting it should be code free.

LussoPerformance · 05-10-2018, 05:14 PM

Quote:

Originally Posted by onfireX5

I know the primary cat deletes are out. Secondary delete ?

Will be available very soon!

m3dragon · 06-08-2018, 11:11 AM

Quote:

Originally Posted by LussoPerformance

Will be available very soon!

What is the cell count of the main CATS if you know?

somer · 06-13-2018, 05:30 PM

Is the M5 getting the particulate filter in addition to 2 sets of cats later this year?

so at this point you have a charcoal filter in the intake, 4 cats, and a particulate filter? is it ever going to end? lol

onfireX5 · 06-13-2018, 05:32 PM

It gets the two charcoal filters in the inlet. 4 cats in the exhaust. So far, no particulate in the exhaust.

rygre · 08-20-2018, 08:06 PM

So you did remove the 2nd cats? No codes or anything?

onfireX5 · 08-20-2018, 08:26 PM

Quote:

Originally Posted by rygre

So you did remove the 2nd cats? No codes or anything?

Did not remove. Not sure yet if the second o2 sensor can measure pressure and trigger a cel if the second cat is deleted. Probably will not, but not sure.

rygre · 08-20-2018, 09:31 PM

I think I'm going to attempt it, worried about cel and possible loss of tq, worst case I'll just put them back I guess. I'll update back.

onfireX5 · 08-21-2018, 07:35 AM

You won’t lose any low end torque with a second cat delete. Should sound better. Report back !

Green///Hell · 08-23-2018, 03:01 PM

I have a secondary cat delete, no loss of Trq and sounds a lot better, no smell, no codes....just easy peasy

onfireX5 · 08-23-2018, 04:03 PM

Quote:

Originally Posted by Green///Hell

I have a secondary cat delete, no loss of Trq and sounds a lot better, no smell, no codes....just easy peasy

Hollow out the existing pipe or a kit ?

Green///Hell · 08-23-2018, 04:24 PM

Quote:

Originally Posted by onfireX5

Quote:

Originally Posted by Green///Hell

I have a secondary cat delete, no loss of Trq and sounds a lot better, no smell, no codes....just easy peasy

Hollow out the existing pipe or a kit ?

It's an eisenmann part, I have the OEM cats separate I'll take pics to show you how restrictive the thing is

rygre · 08-23-2018, 04:25 PM

Mines up on the lift getting 2nd cat delete and custom xpipe as I type this!

rygre · 08-23-2018, 04:26 PM

Quote:

Originally Posted by Green///Hell

It's an eisenmann part, I have the OEM cats separate I'll take pics to show you how restrictive the thing is

Any power difference?

felixleasing · 08-23-2018, 09:03 PM

Quote:

Originally Posted by rygre

Any power difference?

How does it sound

rygre · 08-23-2018, 09:20 PM

Sounds good on mine, butt dyno can tell a difference also. Intake + exaust = getting a little wheelspin now even with launch control. Will dyno again sat and report back how much increase I had.

Hunter399 · 08-25-2018, 04:53 PM

Quote:

Originally Posted by rygre

Mines up on the lift getting 2nd cat delete and custom xpipe as I type this!

Any video available?

Vic55 · 08-28-2018, 05:17 PM

What pipes did everyone use here? (2ndary cats)

Or just have a custom fab job?

onfireX5 · 09-25-2018, 12:27 PM

Quote:

Originally Posted by rygre

Sounds good on mine, butt dyno can tell a difference also. Intake + exaust = getting a little wheelspin now even with launch control. Will dyno again sat and report back how much increase I had.

Did you get chance to dyno the improvement ?

rygre · 09-25-2018, 10:35 PM

Yes I did, with cat delete + xpipe + cai I gained 18whp. It was however dynoed on different days and conditions but same dyno. Not huge gain but it does sound alot better.

G80POWER · 09-26-2018, 05:57 AM

Quote:

Originally Posted by rygre

Yes I did, with cat delete + xpipe + cai I gained 18whp. It was however dynoed on different days and conditions but same dyno. Not huge gain but it does sound alot better.

Any Pics?

04-03-2018, 12:32 PM	#1
onfireX5 Brigadier General 3618 Rep 4,532 Posts Drives: F90M5,F85X5M Join Date: Jul 2015 Location: Va iTrader: (0)	Anyone making a secondary cat delete ? I know the primary cat deletes are out. Secondary delete ?
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04-03-2018, 01:00 PM	#2
onfireX5 Brigadier General 3618 Rep 4,532 Posts Drives: F90M5,F85X5M Join Date: Jul 2015 Location: Va iTrader: (0)	This guy. One on each side. No 02’s after to check on it so deleting it should be code free. Attached Images
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06-13-2018, 05:30 PM	#5
somer Major 951 Rep 1,048 Posts Drives: F10 M5 CP Join Date: Oct 2013 Location: FL iTrader: (0)	Is the M5 getting the particulate filter in addition to 2 sets of cats later this year? so at this point you have a charcoal filter in the intake, 4 cats, and a particulate filter? is it ever going to end? lol
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06-13-2018, 05:32 PM	#6
onfireX5 Brigadier General 3618 Rep 4,532 Posts Drives: F90M5,F85X5M Join Date: Jul 2015 Location: Va iTrader: (0)	It gets the two charcoal filters in the inlet. 4 cats in the exhaust. So far, no particulate in the exhaust.
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08-20-2018, 08:06 PM	#7
rygre New Member 9 Rep 28 Posts Drives: 2018 M5 Join Date: Aug 2018 Location: Paducah Ky iTrader: (0)	So you did remove the 2nd cats? No codes or anything?
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08-20-2018, 09:31 PM	#9
rygre New Member 9 Rep 28 Posts Drives: 2018 M5 Join Date: Aug 2018 Location: Paducah Ky iTrader: (0)	I think I'm going to attempt it, worried about cel and possible loss of tq, worst case I'll just put them back I guess. I'll update back.
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08-21-2018, 07:35 AM	#10
onfireX5 Brigadier General 3618 Rep 4,532 Posts Drives: F90M5,F85X5M Join Date: Jul 2015 Location: Va iTrader: (0)	You won’t lose any low end torque with a second cat delete. Should sound better. Report back !
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08-23-2018, 03:01 PM	#11
Green///Hell Colonel 183 Rep 2,873 Posts Drives: 991 GT3, F15 X5, 1199S Join Date: Feb 2009 Location: Chicago iTrader: (5)	I have a secondary cat delete, no loss of Trq and sounds a lot better, no smell, no codes....just easy peasy
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08-23-2018, 04:25 PM	#14
rygre New Member 9 Rep 28 Posts Drives: 2018 M5 Join Date: Aug 2018 Location: Paducah Ky iTrader: (0)	Mines up on the lift getting 2nd cat delete and custom xpipe as I type this!
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08-23-2018, 09:20 PM	#17
rygre New Member 9 Rep 28 Posts Drives: 2018 M5 Join Date: Aug 2018 Location: Paducah Ky iTrader: (0)	Sounds good on mine, butt dyno can tell a difference also. Intake + exaust = getting a little wheelspin now even with launch control. Will dyno again sat and report back how much increase I had.
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08-28-2018, 05:17 PM	#19
Vic55 Lieutenant General 19222 Rep 10,145 Posts Drives: 2023 BMW M8 Competition Coupe Join Date: Jul 2009 Location: THE Orange County iTrader: (9)	What pipes did everyone use here? (2ndary cats) Or just have a custom fab job? __________________ 2024 BMW M3 CS Frozen Solid White 2023 BMW M8 Coupe Competition Alpine White 2022 Porsche Carrera GTS Coupe Shark Blue 2020 Audi R8 V10 Performance Suzuka Gray 2012 Mercedes Benz C63 AMG Black Series Obsidian Black
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09-25-2018, 10:35 PM	#21
rygre New Member 9 Rep 28 Posts Drives: 2018 M5 Join Date: Aug 2018 Location: Paducah Ky iTrader: (0)	Yes I did, with cat delete + xpipe + cai I gained 18whp. It was however dynoed on different days and conditions but same dyno. Not huge gain but it does sound alot better.
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