aFe Cold Air Intake STG 2

[HP Autosport]

BMW has blessed the E9X M3 with an amazing high revving V8 engine but for such a high strung NA (naturally aspirated) motor, it needs to breathe.

Drop in replacement filters are a nice option but it does not do anything to help the bottlenecking on the intake track. The intake box itself is a great unit. It is sealed, the plastic disperses the heat quickly so it does not become heatsoaked and it takes in air from multiple sources.

The ideal set up would incorporate the stock airbox but create a new intake track. This is what aFe set out to do and they have accomplished this with startling results.

The new aFe stage 2 cold air intake system produces up to 18 max horsepower with 15 ft lbs of torque. It out-flowed the restrictive stock intake by 41%. That’s impressive considering all that was done was opening up the intake track and adding a high flow filter.

This is an integral part of any mod list in order to free up horsepower on the s65.

[Dave07997S]

Originally Posted by HP Autowerks

BMW has blessed the E9X M3 with an amazing high revving V8 engine but for such a high strung NA (naturally aspirated) motor, it needs to breathe.

Drop in replacement filters are a nice option but it does not do anything to help the bottlenecking on the intake track. The intake box itself is a great unit. It is sealed, the plastic disperses the heat quickly so it does not become heatsoaked and it takes in air from multiple sources.

The ideal set up would incorporate the stock airbox but create a new intake track. This is what aFe set out to do and they have accomplished this with startling results.

The new aFe stage 2 cold air intake system produces 18 max horsepower with 15 ft lbs of torque. It out-flowed the restrictive stock intake by 41%. That’s impressive considering all that was done was opening up the intake track and adding a high flow filter.

This is an integral part of any mod list in order to free up horsepower on the s65.

I already have one and will be installing it this week, let the car adapt and will redyno. We shall see what they make. I have a feeling the hp they claim is at a certain rpm vs. what the avg. gain will be throughout the rpm range.

Dave

[onefastman]

18hp from a intake is almost comical

They have even more insane gains for the n54 and it has been shown to prouce very little gain.

[stefanos-ktm]

18 HP if it is true i will take it for my car!!!))

[dnvrdrvr]

subscribed

[onefastman]

No kiddin lol

[J08M3]

[HP Autosport]

Should have clarified guys, it is up to 18hp and 15tq.

I just spoke with aFe and they said that their shop M3 produced these numbers on their in house dyno.

Numbers will vary from car to car but you will see the most gains with this intake when paired with exhaust and tune.

[kitw]

hehe, I have one too. Waiting to get my car back to put it on.

I like how in the installation video, the guy puts the airbox lid back on incorrectly, smashing the duct with the forward left side of the airbox lid

[xchosun1x]

^^ hahah never noticed that.

i'm interested in this intake as well....

hopefully 3rd party testing will produces the numbers as it claims!!!

if so it'll be the best selling intake ever haha

[M3_WC]

Originally Posted by HP Autowerks

I just spoke with aFe and they said that their shop M3 produced these numbers on their in house dyno.

This is always their response. Yet BMW owners across the range can never replicate their BS numbers. Just ask the E60 guys for example, there was massive refunds given by a vendor.

[Dave07997S]

Originally Posted by kitw

hehe, I have one too. Waiting to get my car back to put it on.

I like how in the installation video, the guy puts the airbox lid back on incorrectly, smashing the duct with the forward left side of the airbox lid

LOL...

I'm skeptical..we shall see. I saw the video and I thought that wasn't right. Only thing about dynoing these things is it costs money. Anyone willing to pitch in for dyno runs..

Dave

[Dave07997S]

Originally Posted by shift@red

I would need to see an independant dyno to believe the results. I think maybe about half (9 rwhp) would seem ok, since most guys get about 6 from the MS filter alone.

Thats what I am going to do...the shop I am dynoing at is where I did my baseline which is a Mustang shop, doesn't have anything to do with BMWs. I will report. The intake will be on the car for a week to let adaption take place and go from there.

Dave

[MrHarris]

+3whp over a filter just isn't worth it. But it does sound nice...

[Ferre86]

bah get a life.. hard to blieve gain 18hp with CAI system..

[HP Autosport]

I found it hard to believe myself, I posted the words straight from the horses mouth. Whether you gain 18rwhp or 9rwhp the point is that you are removing a restrictor in your intake track, so should you decide to add an exhaust, tune, etc, your engine will already be flowing properly in order to take advantage of those supporting/additional mods.

Anything you do to your M3 is works as a part of a system. You'll maximize your benefits by upgrading each equally.

[powertrip]

I just received mine the other day. I'm not expecting much as far as increased power goes, but it does look MUCH better than the stock piece, and I'm 100% sure that the AFE Dry filter has superior filtration compared to the BMC. The latter is my biggest concern for sure.

AFE is getting a dyno date scheduled for me, so we'll see some results soon. If it makes power, I'll take it to an independent shop and retest it.

Here's a picture of the assembled unit:

[J08M3]

Yeah for high dyno numbers I love racing on the dyno

Is this intake going to put down any faster numbers on a racetrack???

[Dave07997S]

Originally Posted by powertrip

I just received mine the other day. I'm not expecting much as far as increased power goes, but it does look MUCH better than the stock piece, and I'm 100% sure that the AFE Dry filter has superior filtration compared to the BMC. The latter is my biggest concern for sure.

AFE is getting a dyno date scheduled for me, so we'll see some results soon. If it makes power, I'll take it to an independent shop and retest it.

Here's a picture of the assembled unit:

I was going to do the dyno at AFE as well..however, without doing a baseline on their dyno to begin with I thought whats the point...

Dave

[Dave07997S]

Originally Posted by J08M3

Yeah for high dyno numbers I love racing on the dyno

Is this intake going to put down any faster numbers on a racetrack???

My 04 E46 M3 ran the 1320 better by 2mph and .25 reduction in the 1/4 mile with the AFE intake they have for that car. I ran a 13.16 bone stock, with the headers-100cpi cats and Borla cans I ran a 12.98@108mph, did software and intake and I ran a 12.74@109.8mph. I know this was the E46 not the E9X and I am skeptical on the 18hp gain. However, since the 2010+ cars already have the filter without the charcoal insert it would be interesting to see what the gains really are.

Dave

[powertrip]

Yeah I hear ya. My car is already dialed with my mods, so I'm doing it more for AFR readings than anything. Also, we'll be able to see if the system has any added power over my BMC filter. It will be interesting .

Originally Posted by Dave07997S

I was going to do the dyno at AFE as well..however, without doing a baseline on their dyno to begin with I thought whats the point...

Dave

[HP Autosport]

Originally Posted by shift@red

My point in my previous post exactly. Pulleys, a tune (optimized for the intake) and a full exhaust could easily yield very good results, but i still think its a bit misleading to throw the best number possible. If youre going to do that you might as well disclaim it and say *hp numbers provided only in combination with x,y, and z...blah blah blah

I never said that to obtain those numbers you need x,y and z. aFe made those numbers, 18whp and 15wtq on their dyno. So, it apparently can be done.

Based off that, you would see even more gains with a tune, exhaust, etc.