[CorvetteOJ]

I hate to be the bearer of bad news, but, NO, you will definitely not get an increase of 18 hp from a K&N filter. I have added a K&N and a Corsa exhaust system and I will bet I have not increased my hp more than 5, if that much.

I have an '03 Vette that I have added K&N filters, Corsa exhaust, ported and polished throttle body, throttle body bypass, iridium plugs and mega plug wires. On a dyno, with all that I picked up 18hp.

I guess the bottom line is, with K&N filter only, you will definitely not notice any difference, maybe more sound at wot. I still like my K&N filter, hp or no hp. Congratulations on your new H3,

OJ