Well today I fitted my sfs 80mm tip, I decided to keep the same filter setup just to see how different the car felt, I have s2000 filter with a heat shield, so I could do a before and after comparison, I have to say, I am very impressed, if anyone is considered this mod, it is well worth it, throttle response, spool up and mid range are noticeably improved, next step will be a Jetex cone, I'm hoping for even more improvement.