I only purchased the goods from him, we're a few hundred miles apart unfortunately!
Car sounded fine this morning but didnt get a chance to have a good listen due to a pretty heavy rain shower. I must admit that when I switched the engine off when I arrived home, it almost sounded like my exhaust had a slight blow. I'll need to look into this further.
Thanks for the help so far guys.
My mistake reading your first post, but in which case go back to who fitted the Zorst as your post seemed to be wondering if the recent fitment might be a cause....... and given what you have just said.