“Performance” exhaust vs the rest

Trofeo · 09-17-2020, 11:05 PM

Poll on which performance exhaust yields the most whp gains. With Real data.

TonM3 · 09-17-2020, 11:13 PM

Quote:

Originally Posted by Trofeo

Poll on which performance exhaust yields the most whp gains. With Real data.

A 5 way tie for ZERO

KennyFSU · 09-18-2020, 11:12 AM

"Exhaust" is too general.

Do you mean a catback? Downpipe? Exhaust manifold too?

mikeysosa · 09-20-2020, 07:50 PM

The exhaust from behind the catalytic converter back does not carry much restrictions. The real limitations lie with the stock catalytic converter, which simply creates back pressure. Cat back exhausts have minimal PERFORMANCE gains with stock boost. They sure do sound cool though.

Trofeo · 09-21-2020, 11:03 PM

Cat back exhaust of course.

mike@x-ph.com · 09-22-2020, 08:33 AM

they all yield the same power increase (within a 1-2 HP margin)

subzero05 · 10-14-2020, 12:37 PM

don't buy an exhaust for HP, you will be extremely disappointed.

mike@x-ph.com · 10-20-2020, 09:13 AM

Quote:

Originally Posted by subzero05

don't buy an exhaust for HP, you will be extremely disappointed.

+1 get the exhaust for the sound, the weight saving, and additional HP are extras

The_otherM235i · 10-27-2020, 07:34 PM

Getting rid of the cat will yield the most power out of anything you modify on the cars exhaust system, removing the exhaust and mid pipe/resonator will be better for weight savings than power.

TonM3 · 10-27-2020, 08:17 PM

Quote:

Originally Posted by The_otherM235i

Getting rid of the cat will yield the most power out of anything you modify on the cars exhaust system, removing the exhaust and mid pipe/resonator will be better for weight savings than power.

Quote:

Originally Posted by The_otherM235i

Getting rid of the cat will yield the most power out of anything you modify on the cars exhaust system, removing the exhaust and mid pipe/resonator will be better for weight savings than power.

Getting rid of the cat is also a state and federal crime.

KennyFSU · 10-28-2020, 06:34 AM

That's hardly an issue with states that don't have emissions.

subzero05 · 10-29-2020, 01:56 PM

Quote:

Originally Posted by KennyFSU

That's hardly an issue with states that don't have emissions.

tell that to the EPA when they knock on your door or close down the shop who did the work for you

The_otherM235i · 10-31-2020, 10:37 AM

Quote:

Originally Posted by TonM3

Quote:

Originally Posted by The_otherM235i

Getting rid of the cat will yield the most power out of anything you modify on the cars exhaust system, removing the exhaust and mid pipe/resonator will be better for weight savings than power.

Quote:

Originally Posted by The_otherM235i

Getting rid of the cat will yield the most power out of anything you modify on the cars exhaust system, removing the exhaust and mid pipe/resonator will be better for weight savings than power.

Getting rid of the cat is also a state and federal crime.

Lol so is a lot of things.

09-17-2020, 11:05 PM	#1
Trofeo Enlisted Member 6 Rep 31 Posts Drives: M235 Join Date: Dec 2019 Location: 416 iTrader: (0)	“Performance” exhaust vs the rest Poll on which performance exhaust yields the most whp gains. With Real data.
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09-18-2020, 11:12 AM	#3
KennyFSU Captain 1103 Rep 736 Posts Drives: Lexus RC F Join Date: Nov 2019 Location: Florida iTrader: (0) Garage List 2016 BMW F22 M235xi [0.00] 1991 Suzuki Intrude ... [0.00]	"Exhaust" is too general. Do you mean a catback? Downpipe? Exhaust manifold too? __________________ Estoril Blue E36M3 Mineral Grey M235ix/12.02 @ 115 Ultra White Lexus RC F
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09-20-2020, 07:50 PM	#4
mikeysosa Second Lieutenant 163 Rep 216 Posts Drives: 2016 BMW M235i Join Date: Oct 2019 Location: Cocoa Beach, FL iTrader: (0) Garage List 1995 Mazda Miata [0.00] 2016 BMW M235i [0.00]	The exhaust from behind the catalytic converter back does not carry much restrictions. The real limitations lie with the stock catalytic converter, which simply creates back pressure. Cat back exhausts have minimal PERFORMANCE gains with stock boost. They sure do sound cool though. __________________
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09-21-2020, 11:03 PM	#5
Trofeo Enlisted Member 6 Rep 31 Posts Drives: M235 Join Date: Dec 2019 Location: 416 iTrader: (0)	Cat back exhaust of course.
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09-22-2020, 08:33 AM	#6
mike@x-ph.com Joint Chiefs of Staff 24032 Rep 190,539 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	they all yield the same power increase (within a 1-2 HP margin) __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
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10-14-2020, 12:37 PM	#7
subzero05 Second Lieutenant 116 Rep 226 Posts Drives: 2007 335 Join Date: Feb 2015 Location: california iTrader: (0)	don't buy an exhaust for HP, you will be extremely disappointed.
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10-27-2020, 07:34 PM	#9
The_otherM235i Driver - Autocross 74 Rep 178 Posts Drives: BMW M235i Join Date: Mar 2020 Location: Ontario Canada iTrader: (0)	Getting rid of the cat will yield the most power out of anything you modify on the cars exhaust system, removing the exhaust and mid pipe/resonator will be better for weight savings than power. __________________ 16 M235xi 8ZF Black on Red FBO: Xhp trans tune -BMS Intake - VRSF Catless DownPipe - VRSF CP - VRSF Muffler delete/resonator - n22 plugs - MHD stage 2+ 95map - Wagner EVO II Preformace IC - Rear seat delete - weight reduction/stripping -FTP 18.5in rims - Hawk HPS front pads - StopTech STR 660 fluid
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10-28-2020, 06:34 AM	#11
KennyFSU Captain 1103 Rep 736 Posts Drives: Lexus RC F Join Date: Nov 2019 Location: Florida iTrader: (0) Garage List 2016 BMW F22 M235xi [0.00] 1991 Suzuki Intrude ... [0.00]	That's hardly an issue with states that don't have emissions. __________________ Estoril Blue E36M3 Mineral Grey M235ix/12.02 @ 115 Ultra White Lexus RC F
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