Would it effect my performance if I replaced the stock air filter with an aftermarket one such as a K&N filter. If so roughly how much of achange would it be?

 

I don't think you gain a thing. This is my opinion. The engine is designed for power and ecnomy in a small package. A restrictive air cleaner design would -be stupid- for Toyota to put on this engine.

"sell the sizzle, not the steak" is how all aftermarket parts makers -must- market their goods. K&N is an excellent, respected company with fine filters. But is an aftermarket filter system reallly any better than stock?

I have not seen dyno tests nor a/b comparisons. Who has? Word of mouth subjective judgements do not count for much more than mental excitements.

"kis"

 

Damn! Wish I had said that

I just bought a K&N Aitfilter for my xb... not for power but because it will be ultimately cheaper than buying and throwing away the origional paper style elements.

Walt

 

THERE HAVE BEEN DYNO's done on the intakes and proven results

see this thread

https://www.scionlife.com/forums/viewtopic.php?t=4168

btw this should be moved to POWER HUNGRY since it has nothing to do with wheels

 

That thread is for whole intake setups, not drop-in filters for the stock box. I've seen subjective reviews of those but nothing proven.

 

i had to re-read your post a few times to get it

i thought u were saying that there were no proven results for intake systems... now that i see you are talking about drop ins only.. cant help on that one

 

with scions, it's not always about perfomance. it's about performance look. visual excitment.

 

Yes, we love the looks and we love to pour money into our cars' appearance items. That's ONE thing, this emotional impact and so on.

It's another thing to "justify" the expenses by believing advertiser's promises and users' -subjective- claims "oooh its so much better now!".

Sellers do ovestate and users do suffer the Placebo Effect (I know, I've had that many times, myself!)



Sci coins a new saying:

take a blank reality check along with your checkbook

 

That said, and before this thread gets too far off-topic, I have a speed secret (ha ha)

I will be speeding along faster than any of you here, very shortly, without touching a thing under the hood.

I'm putting on faster tires later this week

I say with a a friendly nudge, but not blowing smoke: "eat my dust"

 

Green makes a Drop in for the xB that produces more power (# 2385) they also make drop in's for Callaway and Saleen and there are two companys that know how to make power!

 

To think that Toyota only uses the best of everything is a stretch. There is always a balance point between best price and best quality.

One of the other selling points of a car is cost of maintenance. Cheap disposable filter or quality reusable? Which one fits the scenario better? Many people wouldn't take the time to clean a reusable filter anyway.

 

imho when i switched to the injen sri from the stock air box with the k&n drop in filter i felt no change in the power band. just change in the sound

the sri was the last power mod i did after the header and the trd muffler