Hi to all you GM people

I just joined the forum and I'm excited about it. My first car was a 1968 Pontiac LeMans 350 automatic,loved that car. I owned many GM'* ever since. Right now in my garage I have a 2008 2500 Sierra and a 1976 Trans Am ( my toy ).My question is about my 08 Sierra, its a 2500 hd with a 6.0 gas engine. I have been hearing some about adding a cold air intake to boost some HP and improve on a little MPG. Some people swear by K&N filters and intake. Has anyone out there had any experience with this type of add on or know someone who has. I'm looking for input to see if it'* worth it or not. Thanks



GMdude

K&N filters are just less restrictive. But they require constant care and cleaning. After being cleaned, you must apply their special oil to the filter to trap the finer particles that the filter itself cannot catch. The bad side of this filter is, the oil tends to leave the filter and get stuck on the MAF sensor causing skewed data. Which hurts HP and MPG.

IMO, leave the filter alone. Its not really worth the 2-3 HP gain.

Thanks for the quick response Mike. I have heard stories of the same issue and people not liking them, so maybe there are not what they are cracked up to be

Granted, they do work, but like I said, IMO, they are not worth the hassle for just a few ponies.

I wanted it mostly for pulling a trailer on occasions so I'm thinking the $350 investment might not really be worth it . Thanks again for your input .

My 2001 Yukon 5.3 came with a K&N when I got it used. In short: every sensor (and every other surface) after the filter was coated with what could be described as black paste all the way to the valves. The IAC had an oddly-shaped formation of the stuff on top of it that was restricting air flow. The formation was about a half-inch tall. Took hours to clean probably half of it out, couldn't get to a lot of it. I agree with Mike, you might see a couple of horsepower from it today, but will lose power and cause problems tomorrow.