Theres a few guides out there to do it, its very easy and with the car up in the air it shouldnt take long. I had mine done at the time when i had my remapped. It doeant make any difference for the mot and definately has small but noticeable benefits. Its cheap option instead of a downpipe and sports cat which would ultimately be better but with the pre cat delete you can run a stage 1.5 map which isnt so very different from a stage 2 as exhaust gas temps can be reduced with the better exhaust flow from the pre cat being removed. My map runs about the same boost as a stage 2 and although i havent had it on a rolling road from my maf peak readings im looking at 250bhp. I have a tfsi and have a shark 1.5 map.
