any thing to do with the exhaust runs the risk of seized bolts and studs so be prepaired for this , should be easy if you dont break any . john

on top of the heater box under the dash is a little black box this is part of the alarm i seem to remember land rover mechs call it a spider box ? well when you get to it remove the cover and look on the back of the circuit board you may find a dry joint if so clean it and re solder it worked...

ps i'm getting one for my tdi as its still to cold outside. john

ALL TO DO WITH EMISSION CONTROL best to block it up and help to warm up the global warming thing on a serious note you would probably only see the differance on a dyno as it has already been said your engine likes lots of cold air to burn not hot ****ty exhaust gasses.john