hey i have an 03 rx1 le and last year i bought some upgrades from a guy o here.it was a clutch kit and a esp kit whick was jets k@n filters slide springs. I had it all put in and the sled really worked awesome.got it out this year and seamed to work really good again but i friend of mine bought an 03 rx1 too cause he loved mine and his is completely stock but hes is faster and takes me everytime.And even the f7s are taking me any idea what the problem could be.I did have to replace the plugs cause they were bad.