Originally Posted by Moonracer
We did three identical pulls with the K&N filter the three with a stock paper filter of the same size and it averaged out to 3hp differance. We found it hard to believe too. One thing we thought about was the fact of the oil in the K&N being freshlly redone and the paper filter was also new. Mabey after some laps as the get dirtier the K&N might be better. We also have found alot more dirt in our carb. after a race with the K&N. With the paper filter we have alot less dirt in the carb. We were always firm believers in K&N untill this.
wat car was this? maybe it could be different on others?