Lopéz said:Could easily be. That's the trouble with intermittend noises, they're very difficult to pin down.
Just fitted a K+N taken from a Sierra Cosworth to it this afternoon, doesn't make a huge difference to the induction note but the car seems an awful lot more urgent to drive! Do breathing mods really make that much of a difference to these or am I getting sucked in by placebo effect?
Fitting an Apexi fliter was my first mod and I did think at the time that the car wanted to rev through a bit quicker. Sort out the exhaust as said and it makes a pretty large difference as the two cats strangles the car and you'll gain a few psi of boost whilst doing so..