my guess is that it keeps breaking down as you wont spend decent money on stuff for it.
This isnt a dig soley at you but too many people are running these good sports cars into the ground by scrimping on them.
I track my car regularly and havent had a thing break on it yet. As said before "buy cheap buy twice"
spend the extra, and it will last you much longer. The 120quid is half as much again, but the scorpion at circa 400 quid is still a third of the price of a nissan exhaust let alone the nismo exhaust.
You should really consider spending the extra, if the running costs are too high then maybe the zed isnt the car for you in this current economic downturn. Not meaning to sound like an arse but this is happening far too often. Because there is alot of zeds in the 10k price bracket people buy them thinking yeah its a cheap car and dont consider the running costs. I could afford an r35 gtr but i certainly couldnt afford to run it. No point being cheap on the zed as you could buy a second hand exhaust and it could blow within a week. 400 quid for an exhaust with lifetime guarantee is fantastic. A set of tyres costs 3 times that.
Rant over