I'm certain this has been well discussed but here's my 2 cents:

This is a very, very well made kit. I've installed both the Stillen and JWT on my old g35 and neither had the completeness of the Fujita.

The Stillen, then and now, uses a cheap, easy to damage air box coupled with the need to spend more to get a smooth flow intake tube to that box. On the G35, you had to buy the z-tube from the 350's. On our G37's, you have to spend more to get a "long tube." Lame.

The JWT, is a very well designed piece but also uses the stock accordion intake tube. My previous two were loud, and at a specific rpm range under load there was a slight whistle. If I spent alot of time idling, I would have gotten this anyway due to the effective heat shields.

The Fujita goes right from the throttle bodies to the front air duct. It uses stainless steel t-bolt clamps which are both beautiful and functional. T-bolt clamps are commonly used for the pressure of forced induction and also to ensure there's no pinching/crimping of the silicone connector. The inside of the intake tube, other than where the intake sensor resides, is perfectly smooth.

Best of all was the sound it made on startup. Smooth just like stock until about 3500 rpms when it kicks in and gives a restrained roar. This is not a ricey sound at all. Rather, it emits a noise like a built motor from an expensive exotic.

A great deal of time and expertise went into this kit and it shows. Between the Magnaflow and this, I'm really impressed with the level of quality that the aftermarket has provided for us!

 

glad u like em

 

Niceee.... what does the butt dyno say

 

I think my butt's size filters out any true feel!

 

Does Fujita have two different designs for the G37? Here's the one tested by COBB: http://blogs.cobbtuning.com/?p=160

 

Thats cool that they include boost clamps, they are 1000X better than the cheap ones that most intakes come with.

 

Get a sound clip!

 

I can tell you ... you will love them for the first 5 minutes... then ... there done... heat soak is horrible...

Tom: thats very interesting... I never caught that before... Cobbs Fujita is NOT the G37 intakes... maybe thats whyy they made no power

 

Hmmm...and I remember AEM replying to a thread here saying the Nismo/AEM intake that COBB tested wasn't for the G37 either. It was made for the HR engine in the Z. Now, DieselDoug also has a Fujita dyno where it shows no power gains (before the reflash). I wonder which Fujita he tested over at Technosquare?

 

This is simply not 100% accurate. As with any aftermarket modification, you need to carefully consider where you live and how you drive. If I was planning a twin turbo kit and I lived in Denver, it would be entirely different then if I lived in Omaha.

For the way I drive, which is 90% highway at 70+ mph, and where I live, upstate NY, heat shieldless intakes are perfectly fine. Plenty of cool air rushing in from the front air guide and for the two to three times a year I'm actually idling, it takes quite some time for the underhood temps to rise enough in my climate to affect the power delivery. Which returns right after the car starts moving again anyway.

I'm sure that if someone is road racing in Miami, they may have an issue but let's not then pass judgement on the entire setup just because it doesn't work in that circumstance. I could never run a CAI around me due to the boatload of rain and snow and other assorted weather. But I'm sure that for someone in San Diego, or perhaps Tennessee, it's a real advantage in design.

 

For those in warmer climates or who do more idling, I will test air inlet temps of the Fujita with and without a heat shield. I have a pair of 6" long, half round heat shields from some prototype work I was doing with LMS on an FX45 intake. In the next week or so, I'll start graphing the temps, outside temperatures, and other variables. I'll then throw on the heat shields to see if they will lower the temps across the same parameters since it will prevent them from taking engine side air. To be continued....

 

Well I have had Fujitas and Injens both ... and will soon have JWTs... and both intakes so far... have gotten shockingly hot after a 20 minute interstate ride at 70mph.... I guess you can blame that on that dad blamed Tennessee weather...

 

What do you mean by shockingly hot? Hot to the touch? Did you take temperatures of the aftermarket intakes vs. stock? Perhaps the stock box and tube get hot as well?

 

^^I have and no they don't. They get warm but not hot.

 

What gets hot? The metal intake tube or the filter?