Not to well... Been taking it real easy around town the last week what with the double demerit points, so I haven't even had anything more than a little squirt. Well after my first run, I thought that it felt pretty slow down the track, slower than my practices launches at 3am on the way to work over the last few weeks. I grabbed my slip and I was right, 2.3 60ft and 13.2 @ 109mph 1/4mile... I then thought back to the run and how I had very little tyre slip off the line and it didn't seem to start powering home until half track. So rolled around for another run putting the first run down to nerves and maybe I hesitated on the throttle off the line. Second run, felt the exact same, and as I hit the braking area I noticed the MIL was illuminated on the dash, the one that comes on when you don't meet emission standards. So rolled round to the tower and switched the ute off and grabbed my slip, mirror run of my first, 2.34 60ft and 13.2 @ 110mph 1/4 mile. So I thought no way am I going home on a tilt tray so I called it a night. On the way home I took it real easy but just from playing with the revs and throttle it felt really unresponsive and under powered drove fine and sounded fine under 3000 rpm. Got home and had a listen to the exhaust and it sounded different. So I'm thinking maybe a collapsed cat? On the bright side, even under powered I smoked two worked SS commodores. Think I broke one of the guys hearts when he came up to me after wards and told me my ute was quick and I replied with 'nah, its really down on power'. Oh well, you play you pay. Any thoughts? Felix