mickey6

So I could not find the orange cap and started looking for alternatives. Here is one that fits perfectly without the danger of it being sucked back in. Pictures say it all.



Simply put the cap on the chamber opening and tighten. Takes less than 10 minutes.



Enjoy the nicer intake sound.

FisterD

That's funny! What does it actually do?

ArneeA

Gillette - the best a Porsche can get

gota911

Darin,

The orange cap mod makes a louder intake sound but only at wide-open-throttle. THere are no NP gains. Kind of like when you were a kid and clipped baseball cards on you bike to make ot sound cool.

Phil G.

I put the cards on my S4 wheels - awesome sound and cheaper than Borla exhaust.

gota911

Phil, from what I understand, the S4 did need SOMETHING!

Phil G.

Yeah, a replacement - which is 3 weeks away!!

Orient Express

This mod blocks the Helmholtz resonator that is in the top of the air box. The resonator dampens the intake acoustics especially in the lower frequencies and this also smooths the airflow backpressure at the MAF.

Blocking the resonator makes the intake sound louder and adds 50 IHP*.

*IHP "Imaginary Horse Power"

Chuck Jones

I guess while you're at it you could take off the muffler too....

htny

too funny.

It's been a while since I read the orange cap threads, was there a CEL/MAF type issue over time?

Orient Express

It is used as an aid to the MAF and is it is referred as a "Muffler" here:

htny

so increased turbulence to MAF would result in ECU causing car to run richer? leaner?

Orient Express

Yes, it could.

82_930

I was doing some research on this, but the OP's pics are no longer up... could someone repost or at least explain how do to this a little better? Thanks

leedav

Probably imaginary, but I thought it reduced throttle lag. Maybe by making the air chamber smaller. It's been in mine forever.