Only where it matters- at the MAF sensor. The tube necks down temporarily at the sensor in order for the readings to be correct without having to reprogram the ECU to compensate for airspeed. Everywhere else the tubing is 2.75".

I'm assuming that's why you asked

 

Nice clean "stealth" look, likin' it

 

Right on

 

You bet!
Note that the takeda does take a little more care to install correctly to avoid rubbing and vibration that you can hear, but I still recommend it if you are a decent wrench.

 

The website states this is for a coupe. Why would there even be a difference between a coupe and sedan, it's the same engine right?

 

Its the same intake for both. The information just isn't up to date.