Hey mate, I see you've got a thread going on your zenons, was going to suggest asking on here as there's plenty of people that will know 100% how to tell if they're retrofitted. As for my map, I drove to R-Tech headquarters in Hinckley, the guys are great and Nick really knows his stuff. He's on here as R-Tech Nic if you have any technical questions on maps etc.
Had the DSG mapped as it raised the torque limiters up from 350Nm as otherwise after the engine remap, the box restricts the torque at that level. Post maps, my peak torque is around 410Nm so it makes a big difference. I didn't get the cat removed as its definitely needed for MOT, I had the pre-cat removed which I understand is just for German regs and not needed here in the UK. It helps to make the standard exhaust more free-flowing.
Had the four wheel alignment done after getting the lowering springs fitted to check all was in order. Especially as I'd just had four new Pirelli tyres fitted. SuperPro anti lift bushes help reduce lift under acceleration and dive under braking, which along with the lowering springs help keep the car more stable overall and flatter in the corners. Wasn't planning on getting them done straight away but my console bushes were cracked and the quote from VW dealer to replace them was
The SuperPro's replace them and are much stiffer than the standard rubber ones. Really tightens up the feel, would recommend.
Do you have an Ed30? Would really recommend mapping, it transforms the car completely. Still feels factory in terms of delivery and in D it's still a great cruiser, but in manual mode or S when you're heavier with the right foot, it's relentless. Lovely!
Hope you get to the bottom of the zenons, there's plenty of knowledgeable peeps on here that I'm sure will help. It's a great site.