Over the weekend I fitted the GDI Club sport exhaust to my +4, the full system with the twin tail pipe. A 40mile test drive showed that the car now suffers from exhaust fumes in the cabin, car running with the hood down and side screens on. A major difference in the pipe is that the outlets are some 25 mm higher, than the previous single outlet pipe, and thus quite near to the rear of the wing. I then refitted the old single outlet tail pipe and the problem has gone away.
I would be interested to know if any others have found this issue with the twin outlet pipe and what was your fix?
Cheers
John
