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      07-11-2016, 03:11 PM   #1
TasteTheRambo
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Best Tune, Intake and DP for M4?

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I just bought an M4 and was wondering who makes really good true downpipes, tune and intake for an M4?
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      07-11-2016, 03:18 PM   #2
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Quote:
Originally Posted by TasteTheRambo View Post
I just bought an M4 and was wondering who makes really good true downpipes, tune and intake for an M4?
Akra or eisenmann for DP if youre looking for beat quality. Vsrf if budget. Downpipes are relatively useless on stock turbos except for making your car loud and illegal.
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      07-11-2016, 08:36 PM   #3
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Downpipes are relatively useless on stock turbos except for making your car loud and illegal.
Thats simply not true, cat-less DP's free up significant back pressure allowing your stock turbo's to spool up even quicker and been proven to add ~20rwhp to a JB4 tuned car (map 2 & higher boost+). On aftermarket turbos the gains obviously grow. They even add power with no tune at all, albeit smaller gains... this has all been thoroughly documented without countless dyno charts and threads if you use the search function.

And VSRF may not charge a BS M-tax as oppose to others but are proven to be amoung the highest quality DP's available in overall quality. (welds and fitment)👍
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      07-11-2016, 09:02 PM   #4
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Originally Posted by BMW M4 PWR View Post
Thats simply not true, cat-less DP's free up significant back pressure allowing your stock turbo's to spool up even quicker and been proven to add ~20rwhp to a JB4 tuned car (map 2 & higher boost+). On aftermarket turbos the gains obviously grow. They even add power with no tune at all, albeit smaller gains... this has all been thoroughly documented without countless dyno charts and threads if you use the search function.

And VSRF may not charge a BS M-tax as oppose to others but are proven to be amoung the highest quality DP's available in overall quality. (welds and fitment)👍
Terry at BMS is who says they are pretty much useless.
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      07-11-2016, 09:10 PM   #5
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Terry at BMS is who says they are pretty much useless.
Whaat!? Terry, get your butt out here! Do you REALLY believe that!? lol
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      07-11-2016, 09:40 PM   #6
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Whaat!? Terry, get your butt out here! Do you REALLY believe that!? lol
Yep and ive owned an s55 for 2 years with and without downpipes.
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      07-11-2016, 09:56 PM   #7
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Quote:
Originally Posted by dmk08
Quote:
Originally Posted by TasteTheRambo View Post
I just bought an M4 and was wondering who makes really good true downpipes, tune and intake for an M4?
Akra or eisenmann for DP if youre looking for beat quality. Vsrf if budget. Downpipes are relatively useless on stock turbos except for making your car loud and illegal.
Thanks DMK08, as for Tunes is the JB4 the only tune out there for the M4? and what do you think of the AFE intake are they any good?
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      07-11-2016, 10:00 PM   #8
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Quote:
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Terry at BMS is who says they are pretty much useless.
Yeah...about that.



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      07-11-2016, 10:03 PM   #9
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Yeah...about that.



Yea, *like I was saying* ...Thanks FC4...
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      07-11-2016, 10:12 PM   #10
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Yeah...about that.



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      07-11-2016, 10:14 PM   #11
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      07-11-2016, 10:22 PM   #12
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Yea, *like I thought* Thanks FC4...
Increasing exhaust flow is one of the most effective ways to improve performance of a turbocharged car. Eliminating the most restrictive part(s) of a factory exhaust system is your best bet. However, when those restrictions are catalytic convertors and you have the California Air Resources Board breathing down your neck, you might change what you message publicly.
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      07-11-2016, 10:29 PM   #13
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Increasing exhaust flow is one of the most effective ways to improve performance of a turbocharged car. Eliminating the most restrictive part(s) of a factory exhaust system is your best bet. However, when those restrictions are catalytic convertors and you have the California Air Resources Board breathing down your neck, you might change what you message publicly.
I was speaking in terms of maximum "off-road" performance ONLY... of course*😉👍
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      07-11-2016, 10:49 PM   #14
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Quote:
Originally Posted by TasteTheRambo
I just bought an M4 and was wondering who makes really good true downpipes, tune and intake for an M4?
I would get the VF Hex tune. Look it up on the forum. A ton of good reviews and awesome customer service. The downside is a shop has to pull the DME and jailbreak it.
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      07-12-2016, 05:37 AM   #15
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Just for the record, ando (at Bms) has an m4 running jb4, meth, intakes, CPs, Bms exhaust gets ~560whp on stock dps..more power than most of you goons are running.

Just thought I'd leave that here
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      07-12-2016, 09:03 AM   #16
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I will go with the akra downpipe and evolve tuning.

Ill take a proper tune over the jb4 any day.

Not too sure for the intake, costs the most but gains the least.
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      07-12-2016, 09:12 AM   #17
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Catless Downpipes will absolutely give you added power, typically 15-25 wheel hp depending on your application. Most turbo charged BMW F series engine platforms see a nice gain when removing the factory cats. We have seen some vehicles pick up even more.. AMG(M157), Porsche 996/7 turbo, etc. If you have a tune that can take care of all your annoying cel issues it's totally worth it, for off-road use of course.
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      07-12-2016, 09:59 AM   #18
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I have a set of Fabspeed Catless Downpipes and the Fabspeed Catless X-Pipe designed specifically for use with the M-Performance Exhaust on order. (While the catless downpipes obviously remove the primary cats from the exhaust, the catless X-Pipe removes the secondary (unmonitored) cats from the system).

I'm not sure if I'm going to bolt all of this up at the same time or just install the X-Pipe first to see how it goes.

I also have a set (2) of the ****** "IO2" O2 simulators sitting on my desk: http://www.******.ca/io2/

I'm not ready to reflash my ECU yet, but the IO2 simulators will reportedly eliminate the possibility of any cat related error codes. They don't clear ANY and ALL CEL codes (like custom tunes), the ECU simply never sees any cat related issues in the first place. With the IO2 devices, it should be possible to run catless downpipes without a special tune, never throw a catless CEL code, continue to get any/all OTHER CEL codes, and even pass OBD emissions tests (if needed).

In any case, I'm going to be curious how much of a difference I will see on the track with the Catless Downpipes and Catless X-Pipe and the stock BMW tune. The IO2 devices are just the icing on the cake that SHOULD let me run a factory tune with no cat related CEL's.

...and yes, my M4 is my track car...
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      07-12-2016, 10:02 AM   #19
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OK - Can someone tell me why the URL and Company Name above were automatically censored in my post?
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      07-12-2016, 10:07 AM   #20
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Oh yay! One of these threads!
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      07-12-2016, 10:12 AM   #21
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One of "what" threads?
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      07-12-2016, 01:41 PM   #22
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Oh yay! One of these threads!
I told you the best tune is stock.
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