Il give a few examples
1. VW bonnet gas struts that bent the bonnet/cracked the paint

2. ITR Spoon drop in filter- £100 to lose a load of midrange torque & gain SFA!!!

3. VW uprated headlight relay kit- lasted about 3 weeks before the headlights developed a mind of their own...
4. ITR blueflame exhaust. Sounded like a chav-wagon & went no faster!
I could go on!!!
Do any of you also have any horror stories? Seems to me there is an awful lot of rubbish out there to trip up the unwary
Chris