Well I brought myself a relentless version 2 (I believe) around nine months ago when I was re-building my blown up engine. I have done around six thousand miles since the re-build and I had recently started to notice I blowing noise coming from the engine bay when I started it from cold. this noise would then get much more quieter as the engine got hotter. So today I decided to have a look as I had a new turbo to downpipe gasket as this is what I believed was at fault. To my disbelief I found that my nearly new relentless manifold had a 3" split down it. I wont be driving the car anymore until this is fixed due to the fact I don't want anything brakeing and falling into my new CR hybrid. The car hasn't been running hot, two reasons for this. First being I had a professional custom map done by bill, second being I have never taking this car on any race days. It only ever has a quick blast here and there. So what could have caused this to break like it has done? I guess this will involve me taking the whole head back off the car again to change once I fined a new one? The crack is where it branched together to go onto the turbo