hello sue welcome 2 passion ford,

By the sounds of ur post yer with the right exhaust u should b lookin at 270bhp, i wouldnt fuss 2 much bout the cone filter, their r people runnin big bhp on here usin the standard air filter, u may just need 2 change the panel filter inside, as smit said u can pick up some wicked deals on here on a second hand exhaust, or even look on e-bay i picked up a brand new full mongoose system 4 bout £300,

I had the same problem with my old back box rubbin when i booted the gass, looked amazin at night sparks all over the place, but wrecked the exhaust, look 2 c if the exhaust is fitted correctly, on the right mounts, if it is then time 2 look at the suspension, if its original it could b tired n need replacin, then again it could have been lowerd stupid amounts, just a couple of things 4 u 2 check