when I take the R32 out for a long drive(this only started happening since we had shit hot weather) the car loses power and sounds really off. It loses power but boost can still come on. It sounds like a boxer almost but with way less power. The car runs fine otherwise and like I said only happens on long hot drives. I was thinking maybe the exhaust manifold gasket had gone at the front cylinder. Any help in the matter would be most appreciated.