We I've just been getting the GSI ready for this years trackday sesson and had a few jobs to do. First one was to replace the rad with a new ali one
the old one was shot to bits.

When it was in place and all back together I took it for a test drive all went OK untill a loud bang came from the back of the car when I hit the rev limiter

then no power felt like a turbo hose had come off. Got it back to the unit and had a look round all the turbo pipes nothing wrong looked at the waste gate nice and tight. Took the cat off and found this.

I think it might be broke. Had a bypass pipe in the garage so put that on now its back to normal
Roll on the next trackday.