Thanks for the interesting replies. I shall give it more time to burn off the coatings etc but the fact that changing to the lower exit pipe improved things, indicates to me at least, that it is an updraught issue. The fact that a few of you sorted your cars by fitting a side exit pipe is telling as well.
Side exit pipes are great on other people’s cars but when I’ve been in cars so equipped, they are noisy if you are on the wrong side. In a +4 I am.
As the cost of the side exit is not too much I might well give it a try.
Cheers
John
