JB4 without downpipe

Project Elite · 07-06-2016, 01:44 PM

I currently have an ER catless downpipe paired with jb4 map 2. I was considering going back to the factory cat, how would this affect the jb4? Should I change maps or remove the tune altogether?

Joe_E · 07-08-2016, 02:02 AM

I believe you can just change the maps. Not everyone who has JB4 has the downpipe, so you should be fine.

BIGBOYQ · 07-08-2016, 02:40 AM

Just use Map1 if you have an 328i or if you have an 320i use map 5

mike@x-ph.com · 07-14-2016, 05:55 PM

Use map 1 and you are set

Why are you removing the downpipes?

Project Elite · 07-15-2016, 02:49 AM

Quote:

Originally Posted by mike@x-ph.com

Why are you removing the downpipes?

I want to be a bit more quiet and subtle, but every time I see an M3/M4 driving spiritedly, I just love how my exhaust note and upshifts sound exactly like theirs (ER catless + AWE exhaust). Hard decision but still contemplating...

Mamyf30 · 07-15-2016, 05:58 AM

You will regret the power loss!

mike@x-ph.com · 07-15-2016, 10:37 AM

Quote:

Originally Posted by Project Elite

I want to be a bit more quiet and subtle, but every time I see an M3/M4 driving spiritedly, I just love how my exhaust note and upshifts sound exactly like theirs (ER catless + AWE exhaust). Hard decision but still contemplating...

Do catted

ACR3597 · 07-15-2016, 10:52 AM

You wouldn't happen to have a video of the exhaust and downpipe would you? I have the AWE exhaust with the mid pipe and have been curious how it would sound with a catless downpipe.

Project Elite · 07-16-2016, 01:39 AM

Quote:

Originally Posted by Mamyf30

You will regret the power loss!

Not with a JB4, I won't

I pass people with ease with just progressive, mild throttle

Quote:

Originally Posted by ACR3597

You wouldn't happen to have a video of the exhaust and downpipe would you? I have the AWE exhaust with the mid pipe and have been curious how it would sound with a catless downpipe.

I can send you a short video from my phone, PM me your #.

07-06-2016, 01:44 PM	#1
Project Elite Captain 137 Rep 647 Posts Drives: F30 Join Date: Sep 2015 Location: Bay Area iTrader: (1)	JB4 without downpipe I currently have an ER catless downpipe paired with jb4 map 2. I was considering going back to the factory cat, how would this affect the jb4? Should I change maps or remove the tune altogether?
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07-08-2016, 02:02 AM	#2
Joe_E Captain 264 Rep 953 Posts Drives: FBO 328i Join Date: Aug 2014 Location: Los Angeles, CA iTrader: (0)	I believe you can just change the maps. Not everyone who has JB4 has the downpipe, so you should be fine.
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07-08-2016, 02:40 AM	#3
BIGBOYQ Private First Class 37 Rep 193 Posts Drives: Z4 28i Join Date: Nov 2011 Location: England iTrader: (0)	Just use Map1 if you have an 328i or if you have an 320i use map 5 __________________ E89 28i (14) e92 335i (sold) e46 330D (Sold) e46 220D (Sold)
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07-14-2016, 05:55 PM	#4
mike@x-ph.com BimmerPost Supporting Vendor 24191 Rep 190,805 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	Use map 1 and you are set Why are you removing the downpipes? __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
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07-15-2016, 05:58 AM	#6
Mamyf30 Private First Class 44 Rep 127 Posts Drives: f30 Join Date: Oct 2015 Location: USA iTrader: (0)	You will regret the power loss!
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07-15-2016, 10:52 AM	#8
ACR3597 Second Lieutenant 50 Rep 208 Posts Drives: 2013 BMW 328i MSport Join Date: Aug 2015 Location: USA iTrader: (0)	You wouldn't happen to have a video of the exhaust and downpipe would you? I have the AWE exhaust with the mid pipe and have been curious how it would sound with a catless downpipe.
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