FBO minus Catback?

1fastt2 · 02-14-2016, 07:20 PM

I have yet to install everything since its like 5 degrees here in Pa however I have sitting on the floor the following:

VRSF Downpipes
VRSF 7" Intercooler
VRSF Chargepipe w/HKS BOV
MMP Inlets

I have already on the car a JB4 and an Injen Intake.

I have yet to buy a catback exhaust. How much am I leaving on the table sticking with the stock catback?

TrollToll · 02-14-2016, 07:22 PM

I've heard that the factory mufflers really aren't that restrictive.

Antetokounmpo · 02-14-2016, 07:25 PM

pretty much nothing

1fastt2 · 02-14-2016, 07:28 PM

Good to hear, I was kind of thinking the same thing for what I have been reading.

mojobmw_e90 · 02-14-2016, 07:31 PM

All it is, is sound.. Nothing more

OzCoE92 · 02-15-2016, 12:33 PM

There are plenty of people running single turbo kits with the factory mufflers since they actually flow pretty well. If you are going for sleeper, leave them on or get the PE mufflers if you want a small increase in sound.

Jeff@TopGearSolutions · 02-15-2016, 12:38 PM

Not leaving much cause of the cat back. It's maybe good for another 10 HP. You can gain plenty of that back with a custom tune and even moreso with a splash of E85 (E30).

mike@x-ph.com · 02-15-2016, 02:00 PM

Quote:

Originally Posted by 1fastt2

I have yet to install everything since its like 5 degrees here in Pa however I have sitting on the floor the following:

VRSF Downpipes
VRSF 7" Intercooler
VRSF Chargepipe w/HKS BOV
MMP Inlets

I have already on the car a JB4 and an Injen Intake.

I have yet to buy a catback exhaust. How much am I leaving on the table sticking with the stock catback?

In terms of power, you do not need the catback.

You will be able to save ~40 lbs of weight which will make the car a bit faster

02-14-2016, 07:20 PM	#1
1fastt2 Private First Class 99 Rep 178 Posts Drives: 335i Join Date: Mar 2014 Location: Reading Pa iTrader: (0)	FBO minus Catback? I have yet to install everything since its like 5 degrees here in Pa however I have sitting on the floor the following: VRSF Downpipes VRSF 7" Intercooler VRSF Chargepipe w/HKS BOV MMP Inlets I have already on the car a JB4 and an Injen Intake. I have yet to buy a catback exhaust. How much am I leaving on the table sticking with the stock catback? __________________ 2008 e92 335i 6MT - Fully Built Motiv Closed Deck Conversion. Everything else that goes with it.
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02-14-2016, 07:22 PM	#2
TrollToll Banned 656 Rep 946 Posts Drives: 535i Join Date: Sep 2015 Location: Texas iTrader: (0)	I've heard that the factory mufflers really aren't that restrictive.
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02-14-2016, 07:25 PM	#3
Antetokounmpo Brigadier General 1560 Rep 3,475 Posts Drives: E90 6MT FBO; '18 F150 Platinum Join Date: Jul 2013 Location: WI iTrader: (3) Garage List 2018 Ford F-150 Pla ... [0.00] 2008 BMW 335xi [0.00]	pretty much nothing
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02-14-2016, 07:28 PM	#4
1fastt2 Private First Class 99 Rep 178 Posts Drives: 335i Join Date: Mar 2014 Location: Reading Pa iTrader: (0)	Good to hear, I was kind of thinking the same thing for what I have been reading. __________________ 2008 e92 335i 6MT - Fully Built Motiv Closed Deck Conversion. Everything else that goes with it.
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02-14-2016, 07:31 PM	#5
mojobmw_e90 Major 382 Rep 1,497 Posts Drives: 2014 E63S Join Date: Oct 2014 Location: Chicago IL iTrader: (3)	All it is, is sound.. Nothing more
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02-15-2016, 12:33 PM	#6
OzCoE92 Lieutenant 94 Rep 448 Posts Drives: 2012 BMW M3 Join Date: Jun 2014 Location: Wisconsin iTrader: (3)	There are plenty of people running single turbo kits with the factory mufflers since they actually flow pretty well. If you are going for sleeper, leave them on or get the PE mufflers if you want a small increase in sound.
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02-15-2016, 12:38 PM	#7
Jeff@TopGearSolutions 3472 Rep 79,211 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	Not leaving much cause of the cat back. It's maybe good for another 10 HP. You can gain plenty of that back with a custom tune and even moreso with a splash of E85 (E30).
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