Secondary CATS delete - WOW! - Page 2 - New 2009 2010 BMW Z4

Hoa · 10-01-2012, 02:30 PM

this is the secondary portion. it doesnt have any sensor. its after the sensors so you wont have any issue

AsiaKid · 11-21-2012, 12:56 AM

I just deleted the 2nd cats. More burble at downshift not sure about raspy (btw..are raspy and burble similar)..volume about the same...ironically..no more large huge pops..but more a series of smaller gurgles and pops...and as the OP mentioned, more TUM on the upshift.

but i also smell a bit of fumes..and not liking that.

Frogg · 12-14-2012, 02:35 AM

Great mod, but where find the pipes for change the secondary cat?

AsiaKid · 12-14-2012, 04:30 AM

just take to any auto shop that does engine work of any sort and they should know what to do. they just need to cut it off, find a pipe with same diameter and weld back in

Hoa · 12-16-2012, 10:42 AM

Quote:

Originally Posted by Frogg

Great mod, but where find the pipes for change the secondary cat?

Go for Milltek. They are direct replacement bolt on. You can easily bolt the old cats back in if you change your mind or sell the car in the future. You wont have to pay the shop to cut and weld again.

The part numbers are: MSBM197 and MSBM198

http://milltekexhaust.pumaspeed.co.uk/

do a search for the part number and add them to the cart. it wont show up as an individual part unless you do that

You will also need the OEM clamps

Vintage · 12-16-2012, 12:10 PM

that is a nice setup

Frogg · 12-18-2012, 07:18 AM

Thank you very muck Hoa, very nice and complete answer!!

Go to miltek shop, quicly.

al1 · 12-19-2012, 05:37 AM

do you guys think it would sound too raspy even with ar high flow catted downpipe ??

haspi · 12-27-2012, 07:57 PM

anyone with this mod around Miami? Any shops you would recommend?

11-21-2012, 12:56 AM	#24
AsiaKid Lieutenant Drives: Gallardo Spyder // Vellfire Join Date: Jul 2011 Location: Hong Kong Posts: 513 iTrader: (0)	I just deleted the 2nd cats. More burble at downshift not sure about raspy (btw..are raspy and burble similar)..volume about the same...ironically..no more large huge pops..but more a series of smaller gurgles and pops...and as the OP mentioned, more TUM on the upshift. but i also smell a bit of fumes..and not liking that. Last edited by AsiaKid; 11-21-2012 at 09:17 AM.

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10-01-2012, 02:30 PM	#23
Hoa First Lieutenant Drives: Z4 35iS & 528iT Join Date: May 2010 Location: Atlanta l Vietnam Posts: 395 iTrader: (7)	this is the secondary portion. it doesnt have any sensor. its after the sensors so you wont have any issue

12-14-2012, 02:35 AM	#25
Frogg Private Drives: Z4 e89 red pearl/Black roof Join Date: Dec 2012 Location: France, Nice Posts: 73 iTrader: (0)	Great mod, but where find the pipes for change the secondary cat?

12-14-2012, 04:30 AM	#26
AsiaKid Lieutenant Drives: Gallardo Spyder // Vellfire Join Date: Jul 2011 Location: Hong Kong Posts: 513 iTrader: (0)	just take to any auto shop that does engine work of any sort and they should know what to do. they just need to cut it off, find a pipe with same diameter and weld back in

12-16-2012, 12:10 PM	#28
Vintage Colonel Drives: 2010 Z4 35i and 2010 X5 35d Join Date: Aug 2009 Location: Austin, Texas Posts: 2,048 iTrader: (0)	that is a nice setup

12-18-2012, 07:18 AM	#29
Frogg Private Drives: Z4 e89 red pearl/Black roof Join Date: Dec 2012 Location: France, Nice Posts: 73 iTrader: (0)	Thank you very muck Hoa, very nice and complete answer!! Go to miltek shop, quicly.

12-19-2012, 05:37 AM	#30
al1 Private Drives: z4 35i Join Date: Aug 2010 Location: Istanbul / Turkey Posts: 75 iTrader: (0)	do you guys think it would sound too raspy even with ar high flow catted downpipe ??

12-27-2012, 07:57 PM	#31
haspi Private Drives: SDrive35i Join Date: Sep 2009 Location: FL Posts: 50 iTrader: (0)	anyone with this mod around Miami? Any shops you would recommend?