My housemate bought one with a porous head. We went and bought a second hand one off a scrappy for £50. Fitted it and the car seemed very quick on standard boost, spinning wheels in 3rd etc. Turned out it was off a NA 1.4 so it had a super high compression ratio and shredded the gasket. He ended up paying £275 off Renault for a new one. They are rapid and fun, I borrowed it for a month last summer while he was on holiday and its why I got the williams cause the golf I had at the time seemed like a bus in comparison. Strip it, track day weapon surely. All the RTOC lot are pretty sound and dead helpful.