Do performance air-intakes really work/help?

[Bravest NY S4]

They make the car sound nice, but is it REALLY giving any added gain, is there ANY real proof?...this is not including DP's AND CB's

[serumk]

It is somewhat debated. My opinion is that the car already essentially has a cold air intake on it from the factory, and most of the commercially available CAI options allow more of the engine bay's heated air in than the factory design.

I would assume the gain is marginal, nonexistant, or negative; I don't plan to put one on my car.

[Bravest NY S4]

I hear that..... what about something like say, the Carbonio intake, pretty much a fancy carbon-fibre after market kit huh?

[serumk]

I hear that..... what about something like say, the Carbonio intake, pretty much a fancy carbon-fibre after market kit huh?

That's what I've heard -- mainly eye candy. I recall reading something on the Zine about the carbon fiber degrading and discoloring, and I've even heard members specifically criticize the Carbonio for being one of the worst offenders in terms of being performance-robbing.

[Bravest NY S4]

That's what I've heard -- mainly eye candy. I recall reading something on the Zine about the carbon fiber degrading and discoloring, and I've even heard members specifically criticize the Carbonio for being one of the worst offenders in terms of being performance-robbing.

WOW....that is not a good look, I'ma stay rollin with stock!

[joeycuccaro]

Stock is a CAI... Its proven to be better than aftermarket alternatives... keep your stock unit

[Silver B6 S4]

Keep the stock airbox, and put a K&N drop in filter in it. On my 05 and 07 STI's, I lost power with a APEXi intake on the dyno. It gained power with the K&N drop in.

[Bravest NY S4]

Now what's the REAL general consensus on exhausts...? this includes DP'S in conjunction with a CB....or maybe just a some DP's? or maybe just a CB?

[snowplow]

check out my poss i just put up about a few cool air intakes, theres some good ones and some stupid ones

[FastB7S4]

the consensus is that you need to search. (sorry, someone had to say it.)

anyway, catbacks are just for looks and sound. according to vendor dyno's, they do give you some HP but it is definitely not noticeable (not even butt dyno noticeable).

downpipes do give some noticeable increase but nothing to write home about.

[Bravest NY S4]

the consensus is that you need to search. (sorry, someone had to say it.)

anyway, catbacks are just for looks and sound. according to vendor dyno's, they do give you some HP but it is definitely not noticeable (not even butt dyno noticeable).

downpipes do give some noticeable increase but nothing to write home about.

Simmer down now..... That's what these forums are for brotha. Each one-Teach one, dig me??
Thank you for your input, it IS appreciated by the way.

[Slobo7x]

I've had the entire intake apart last week when I was working on the audi, and I must say they have a great intake system from factory.

I don't see how anything aftermarket would provide HP gain, only sound.

Maybe add a K&N filter and don't oil it too much, and be done.

[Bravest NY S4]

I've had the entire intake apart last week when I was working on the audi, and I must say they have a great intake system from factory.

I don't see how anything aftermarket would provide HP gain, only sound




Maybe add a K&N filter and don't oil it too much, and be done.

Thanx bro.... I agree 100%

[S-Fore]

Carbonio is the biggest waste of money yet for my S4. Thank god i sold it for $325 on ebay. I kinda felt bad selling it to him, but he seemed pretty psyched. I got lucky, minimal loss.

[Bravest NY S4]

^^^I'M DEFINITELY CONVINCED BROTHA.....by the way, what kinda parts u got in that garage of urs???

[beemercer]

Definitely just go with a panel filter in the stock air box. I got an ITG panel filter (its a foam filter so apparently there are no issues with oil damaging the MAF sensor) from APR, took about 20 minutes to put in using the recently posted DIY on removing the airbox (iirc 40valve typed it up and its absolutely excellent, search for it). To be honest I can't feel or hear any real difference until about 6000rpm to 7000rpm where the engine feels a bit more eager and seems to rip through that 1000rpm a bit quicker, and has a slight hissing intake sound. All in all for $60 and 20 minutes time I think it was well worth it.

And really I know its been said already but do a quick search of the B6/B7 S4 section there is already some great information in other threads showing that the aftermarket intakes actually flow less air.

[GotRS?]

CAI isn't necessary on these models, nice stock design (my son's Rabbit has the airbox/filter right on top of the engine towards the back above the exhaust, that's when a CAI works)

High flow filter means high flow dirt too (don't argue this, research instead) but if you don't care about that it works better for high revving engines for sure.

[caldy]

Just check out the tuner's websites, such as GMG Racing and Stratmosphere. They have been advertising the RS4 intakes as 'coming soon' for months and months. Could it be that they are unable to better the stock system? Gruppe M claim an extra 7.2 ps and 26.6 Nm but no independent dyno has achieved this and at 138,000 Yen ex-works, it aint cheap. Looks great though.

https://www.gruppem.co.jp/onlinestor...roducts_id=540

[chaos2984]

since were talking about exhaust's too. Has anyone noticed a gas milage gain with putting on an exhaust. I know for most cars when u put an exhaust on you gain mpg. Atleast my dad's 05 mustant Gt we just replaced the rear mufflers with some resonator straight pipes and he gained about 1-1.5 mpg more that the stock exhaust. And that exhaust is almost unrestrictive from the factory. Just 2 cats 1 each bank and straight pipe back to the mufflers thats it.

Some food for thought anyone ever notice this or whatever??

[GotRS?]

When you have a loud exhaust you tend to drive more economically to keep the noise down. That has an impact.

So the Toyota auto trans car driver, on/off throttle run to the next red light, is doing worse than me for sure.

[Bravest NY S4]

Loud is a bit corny.... quiet is classy

[Monkey77]

Loud is a bit corny.... quiet is classy

Yep

[B7Lee]

since were talking about exhaust's too. Has anyone noticed a gas milage gain with putting on an exhaust. I know for most cars when u put an exhaust on you gain mpg. Atleast my dad's 05 mustant Gt we just replaced the rear mufflers with some resonator straight pipes and he gained about 1-1.5 mpg more that the stock exhaust. And that exhaust is almost unrestrictive from the factory. Just 2 cats 1 each bank and straight pipe back to the mufflers thats it.

Some food for thought anyone ever notice this or whatever??

Yup, just installed a Corsa exhaust on the s4. Sounds sweet and improved the mpg by a little. Although it's tough the measure accurately because I had stock CB when it was warm and now in the cold weather I have the aftermarket (I think its known that cold weather = decreased MPG)

[bhvrdr]

Here you go...

http://mjbmotorsport.com/id107.html

cheers! Mike

[AudiOso]

Justincredible wrote this thread on DP's. It's good reading.