removing the underpan will assist cooling in hot weather - if you need to. It also reduces fire risk IF you have any oil leaks because they tend to soak the sound deadening material in the undertray. Oil then flows towards the front of the tray and drips from, usually, the front of the offside rear wheel arch ! Do you want one large pool of oil, or several smaller pools all spread out on your garage floor ? will the neighbours appreciate the slightly increased flat six sound? some more noise but not excessive. Rob F - 31st May, 2001

Craig suggested I remove the undertray rear too - it is also recommended in Andersen's tuning book. So mine is now parked at GT-One. Car is a little noisier, the temperature seems to be a shade more constant and I can now see if there are any leaks! Main reason for taking of the tray was that folks found the exhaust valves were overheating. Regards Alexander - 31st May, 2001

The 964 has a fairly smooth and aerodynamic under belly. The removal of the tray beneath the engine will aid cooling, disperse any oil leaks and release more noise. The removal also reduces weight. In Germany noise levels are even stricter than the UK so one of the under trays jobs is to contain noise. Releasing this can make for a pleasant soundtrack and unlike a noisy exhaust you can easily refit the tray at little or no cost.. Regards Sideways Sid - 1st June, 2001

Shortly after I bought my car 2 years ago I took it to the local OPC who advised me that the undertray was missing and tried to sell me a new one (approx £250.00). As the car seemed to run fine without it I declined their kind offer, and later mentioned it to Russell Lewis of RSR Engineering who has looked after the car for the past 8 yrs. He confirmed that he removed it for the previous owner and would recommend that any 964 runs without the undertray. Mike 89' C4 - 1st June, 2000

Well chaps seeing hows youve all done it then so did i, only took about 10 mins, half expected to find it really wet with oil, but i grabbed hold of most things under there and found it to be dry. giles - 1st June, 2001

One nut at the back (I left this till last) and various bolts around the tray. I was able to remove it without raising the car until........ One of the clips with the captive nuts decided to come loose so any amount of turning of nut did no good. Just when I thought for once it was going to be easy. I then had to remove a rear wheel to get access and hold the nut with some mole grips and undo the bolt. Still pretty easy though. The main problem was that I then felt a compulsion to clean the underside of the engine, a couple of hours later and now a nice clean engine. Also good to see (if you have any oil leaks!) exactly where and how much oil is leaking. Pleasantly surprised that the under tray made the leak look a lot worse than it was. I know I'm sad but I keep just getting under the car for look now!!! Richard - 1st June, 2001