Downpipe help

rice_injected · 08-29-2013, 10:31 AM

Hi guys,

I know there's been a lot of threads in regards to downpipes.

I've done my research and I know which ones are good, bad and just plain terrible. Ive read up on how Catless causes CEL codes being thrown unless you have a proper tune, and or get Catted pipes to avoid a CEL. But even some with Cat's will throw this code and even the O2 sims on the AR aren't guaranteed.

What I'm wondering is if someone can give me an insight on my situation. I have a 07 335i

I currently have Dinan Stage 2 and want to get Downpipes. With or Without Cats don't matter to me but I do want to avoid having a CEL Code or any code go off.

Right now changing tunes isnt really an option for me as I would just like to stick with my Dinan. JB is a possible option maybe one day.

Anyone can suggest if there are any options for me or a way to get aftermarket downpipes without setting off any codes would be greatly appreciated.

Thanks so much guys.

E90Company · 08-29-2013, 10:34 AM

One option is the BMS downpipe fix. It's not a huge deal though if you can deal with an SES light.

roadkillrob · 08-29-2013, 10:53 AM

With or without cats, you will get a CEL, i have the ARDesign one with cats and like everyone else, they worked for a bit, but the cats are not high enough quality for the stringent software and eventually throw CEL's, so don't even waste your money on DP's with Cats in them.

As above, just get catless and they use the BMS DPFix when you need OBDII readiness. Currently they don't recommend you leave in the DPFix all the time, only when you need it, so if you don't like looking at the CEL the rest of the time, you can get the BMS CanTool and it will clear the CEL messages before they light up the dash light so you never see them and it also gives you some other neat things like gauge sweep at startup, shift lights and gauge hijacking, so you can do things like use your fuel guage as a boost gauge etc, it just plugs into the odb port and you can hid the box under the dash.

I have GIAC Stage 2 and my AR downpipes with cats throw cel's, so I use the DPFix when needed and have the can tool to keep the error light off my dash!

rice_injected · 09-09-2013, 09:15 AM

Awesome!

Thanks for your input guys.

Greatly appreciate the help.

08-29-2013, 10:31 AM	#1
rice_injected New Member 0 Rep 14 Posts Drives: E92 Join Date: May 2011 Location: Calgary iTrader: (1)	Downpipe help Hi guys, I know there's been a lot of threads in regards to downpipes. I've done my research and I know which ones are good, bad and just plain terrible. Ive read up on how Catless causes CEL codes being thrown unless you have a proper tune, and or get Catted pipes to avoid a CEL. But even some with Cat's will throw this code and even the O2 sims on the AR aren't guaranteed. What I'm wondering is if someone can give me an insight on my situation. I have a 07 335i I currently have Dinan Stage 2 and want to get Downpipes. With or Without Cats don't matter to me but I do want to avoid having a CEL Code or any code go off. Right now changing tunes isnt really an option for me as I would just like to stick with my Dinan. JB is a possible option maybe one day. Anyone can suggest if there are any options for me or a way to get aftermarket downpipes without setting off any codes would be greatly appreciated. Thanks so much guys.
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08-29-2013, 10:34 AM	#2
E90Company Major General 195 Rep 6,136 Posts Drives: Car Join Date: Mar 2012 Location: FL iTrader: (2)	One option is the BMS downpipe fix. It's not a huge deal though if you can deal with an SES light.
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08-29-2013, 10:53 AM	#3
roadkillrob Major General 866 Rep 5,452 Posts Drives: 08 335i,22 X3M, 2012 C63 Black Join Date: Jul 2007 Location: Boston iTrader: (15)	With or without cats, you will get a CEL, i have the ARDesign one with cats and like everyone else, they worked for a bit, but the cats are not high enough quality for the stringent software and eventually throw CEL's, so don't even waste your money on DP's with Cats in them. As above, just get catless and they use the BMS DPFix when you need OBDII readiness. Currently they don't recommend you leave in the DPFix all the time, only when you need it, so if you don't like looking at the CEL the rest of the time, you can get the BMS CanTool and it will clear the CEL messages before they light up the dash light so you never see them and it also gives you some other neat things like gauge sweep at startup, shift lights and gauge hijacking, so you can do things like use your fuel guage as a boost gauge etc, it just plugs into the odb port and you can hid the box under the dash. I have GIAC Stage 2 and my AR downpipes with cats throw cel's, so I use the DPFix when needed and have the can tool to keep the error light off my dash! __________________ 2022 X3M Brooklyn Grey 2008 E93 335i FBO 2012 Mercedes C63 Black Series Alanite Grey
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09-09-2013, 09:15 AM	#4
rice_injected New Member 0 Rep 14 Posts Drives: E92 Join Date: May 2011 Location: Calgary iTrader: (1)	Awesome! Thanks for your input guys. Greatly appreciate the help.
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