I am thinking of picking up a injen cold air for my sti but someone else recommends the k/n filter instead. What is your educated choice public? Do you guys recommend anything else? Any help will be appreciated

 

I personally would go with the injen intake they have a long time rep for there quality, no dought that k&n have been making some of the best filters known to man for ever and a day, Turb xs makes a shorty intake? don't know much about that intake but turbxs make quality parts and they work with subaru part in a big way. Just some ideas hope it helped a little.

Almost forgot check out the perrin cold air intakes!
Oh and Power enterprize too, pe makes the best turbos for subaru so I would imagine that there intakes are just as quality

Good luck

 

a cold air intake sounds good, looks good, but for the money, the performance is crap. Everyone states that increasing the air flow at the air box will increase performance, but if you save the money and bought some REAL upgrades, you will notice a huge difference. Start with a Vishnu turbo back exhaust, then if you want the fuel to match, get a good engine management system with the proper map. I know that it is a bit pricey, but if you spent the money correctly, you will put out some massive power. I have a 2003 STI and with just the Vishnu turbo back exhaust, I am at 13.2 consistently with no check engine lights, and it will still pass smog. The fit and finish of the Vishnu is superb, and their is no drone at all. Shiv at Vishnu is testing and he releases all of his kits with utmost reliability and performance since he has an in-house-dyno. Air intakes, blow out valves, etc... are a waste of time. If you want to see #'s, buy the Vishnu kits. They are the best value and reliability for the money.

 

Oooops. I bought it in 03. Yes, it is an 04 model.

 

It may fluctuate maybe a pound or so, but no major boost creeping at all. My car is completely stock except for the bolt on turbo back.

 

Our recommendation is to keep your intake stock until it becomes a restriction. And that's not until you are making *big* power with a *big* turbo. Until then, all you are doing is introducing erratic MAF misreadings into your system.

 

I agree with that for the most part David. And my opinion of most intakes for the WRX/STi is that most are not properly designed for our cars other than fitment. And I think the Blitz SUS is garbage, that intake will filter nothing but leaves, you could pour sand into it. Two that merit consideration however are the AVO and the GP Moto short ram intakes. They both feature a velocity stack design that will keep all the air moving at the same speed past the sensor. When the sensor is placed in a straight pipe with no radius from the filter you will get improper readings, this doesn't happen with a radiused velocity stack design. We've had great results with those two intakes at my shop and highly recommend them, most others I would throw in the garbage (the Blitz I would step on and then throw away lol).

Cheers,
Joel

 

Thanks for all of your input