Fitted the Pro Drive rear silencers last month and they have made a massive improvement to the car. Weird thing though.......I decided to try Shell V-power performance unleaded, to see if would improve things still further and guess what? The hesitation returned, although nowhere near as bad - and the car generally didn't run as well as before. I had waited until the fuel warning light came on, before filling up, so there wasn't much of a 'mixture' in the tank. I also drove 250+ miles before coming to this conclusion. I filled back up yesterday with standard unleaded and the car was immediately smoother - like when I first changed the silencers - weird eh?
. I still might go for the remap to totally eradicate the issues, but i'd tell anyone to try the silencers first. Got mine from ebay, for a fraction of the retail price.