Im upgrading to a Cobra turbo bk exhaust with Decat and non res bk box and Hopefully stage 2 re-map. BUT i don't want to change the air intake! will I be able to achieve stage 2 with the standard air intake system?? Ive heard you can get heat soak if you upgrade to a cone filter!!! has any1 heard of this??? apparently Heat Soak is when warm air is drawn in through the cone filter???