Is an exhaust upgrade necessary as FBO?

Grip Grip · 03-13-2016, 09:18 PM

With the mods below I'm wondering if it would be beneficial to upgrade the exhaust to get a little more power. I'm not interested in upgrading simply for changing the sound, and if I do go with an exhaust it would be the VRSF setup.

http://www.vr-speed.com/vrsf-3-5-str...35i-335xi.html

Mods:

7" intercooler
3" catless DP's
Fuel-it Stage 2
E60 tune
VRSF Inlets (currently uninstalled)

bradsm87 · 03-13-2016, 09:54 PM

A secondary cat delete will gain you some performance with tuning. The stock exhaust flows extremely well, minus the cats.

Grip Grip · 03-13-2016, 10:52 PM

Quote:

Originally Posted by bradsm87

A secondary cat delete will gain you some performance with tuning. The stock exhaust flows extremely well, minus the cats.

Do most just cut them out and weld in straight pipes, or is there a bolt-in solution?

Tiago@VRSF · 03-13-2016, 11:00 PM

Replacing the stock cats with straight pipes creates a lot of drone and rasp. This is generally remedied with a couple of resonators. Keep in mind the stock exhaust flows well at FBO power levels. There is a power advantage when going with our exhaust at FBO power levels and the gains are even greater when going with upgraded twins or a single turbo setup.

Another advantage of our system is the decreased weight (42 lbs) and change in exhaust tone at WOT

jcarv20s · 03-14-2016, 10:15 AM

Quote:

Originally Posted by Tiago@VRSF

Replacing the stock cats with straight pipes creates a lot of drone and rasp. This is generally remedied with a couple of resonators. Keep in mind the stock exhaust flows well at FBO power levels. There is a power advantage when going with our exhaust at FBO power levels and the gains are even greater when going with upgraded twins or a single turbo setup.

Another advantage of our system is the decreased weight (42 lbs) and change in exhaust tone at WOT

Any update on your exhaust for the X fellas

, I have your 7'FMIC, DPs, Upper and lower CP's just missing your exhaust

Tiago@VRSF · 03-14-2016, 12:42 PM

Right now the current exhaust will fit with slight modification for the XI guys. We have about a dozen or so XI customers with modified exhausts. We need to finish up development of our F80 3.5" catback before we jump on the XI and race exhaust for the E90.

03-13-2016, 09:18 PM	#1
Grip Grip Lieutenant 185 Rep 545 Posts Drives: E92 335is Join Date: Apr 2015 Location: Greenbrier, TN iTrader: (3)	Is an exhaust upgrade necessary as FBO? With the mods below I'm wondering if it would be beneficial to upgrade the exhaust to get a little more power. I'm not interested in upgrading simply for changing the sound, and if I do go with an exhaust it would be the VRSF setup. http://www.vr-speed.com/vrsf-3-5-str...35i-335xi.html Mods: 7" intercooler 3" catless DP's Fuel-it Stage 2 E60 tune VRSF Inlets (currently uninstalled) __________________ - 335is DCT - 10.5 @ 132 and dropping!
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03-13-2016, 09:54 PM	#2
bradsm87 Lieutenant Colonel 603 Rep 1,693 Posts Drives: F25 LCI xDrive30d Join Date: Jun 2013 Location: Australia iTrader: (0)	A secondary cat delete will gain you some performance with tuning. The stock exhaust flows extremely well, minus the cats.
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03-13-2016, 11:00 PM	#4
Tiago@VRSF 2108 Rep 43,350 Posts Drives: F90 M5 Join Date: Dec 2007 Location: Doral, FL iTrader: (99) Garage List 2014 F30 328xi [0.00] 2015 F82 BMW M4 [0.00] 2013 Ducati 1199 Pa ... [0.00] 2008 BMW 335i [0.00]	Replacing the stock cats with straight pipes creates a lot of drone and rasp. This is generally remedied with a couple of resonators. Keep in mind the stock exhaust flows well at FBO power levels. There is a power advantage when going with our exhaust at FBO power levels and the gains are even greater when going with upgraded twins or a single turbo setup. Another advantage of our system is the decreased weight (42 lbs) and change in exhaust tone at WOT
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03-14-2016, 12:42 PM	#6
Tiago@VRSF 2108 Rep 43,350 Posts Drives: F90 M5 Join Date: Dec 2007 Location: Doral, FL iTrader: (99) Garage List 2014 F30 328xi [0.00] 2015 F82 BMW M4 [0.00] 2013 Ducati 1199 Pa ... [0.00] 2008 BMW 335i [0.00]	Right now the current exhaust will fit with slight modification for the XI guys. We have about a dozen or so XI customers with modified exhausts. We need to finish up development of our F80 3.5" catback before we jump on the XI and race exhaust for the E90.
	Appreciate 0 Quote