Hi guys, Planning on upgrading to an LSD as my Calais as has an open diff, looking at trying to find complete unit from the used parts supplier. Diff is currently 2.92 for automatic vehicle. I also intend on getting an OTR intake and better tyres or spare wheels for the drags. First drag last week with 2mm tread on standard road tyres 245/40 19's was best 14.00sec and half tank of fuel. Vehicle also has Pacemaker cat back steel system. (2 owner car 70,000kms). Have edited this post as found some good threads on ratio. Any idea on what wheel size can be fitted to rear of this to run track tyres with tall side wall...? Say 16's 17's perhaps.