Quote:
Originally Posted by thebarber
ya, i agree....no gains even on the butt-dyno...i have one in the yaris and it still chokes past 5500 or 6000rpm - - i just bought it because i hate paying a toyota tech to install new paper filters when i can run w/ a k&n and clean it myself...
gains would be easier to get on larger displacement engines too....though i talked my dad into a k&n filter on his 3.8L (or is it 3.9?) v6 gmc sierra (2006, iirc) and i couldnt really feel a difference...but he says he gets a couple more mpg now...
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Did it always choke past 5,500 rpms? Giving K&N their due credit, if you're going to notice an improvement that's where the car should feel better than it did before with the paper element.
At the risk of looking like a jerk

it might be worth about 10 minutes of your time, a q-tip and some rubbing alcohol (or the CRC cleaner), because loss of top-end power sometime means dirty MAF. All you need is a small phillips screwdriver to remove the 2 screws. No harder to do then replacing the air filter. Might be worth giving it a try to see if that improves the top-end acceleration.