Hi.
I am with 1600cc engines with the 8mm valves. Looking around to get some valve guides, I saw 9mm guides/stems. A vendor who used to run a garage says the 9mm were made with guides that were superior to the 8mm though expensive.
Is there anyone with information on this? Is it worthwhile considering getting the 9mm guides and exhausts as a replacement for the former?...that is if the valve heads will sit well on the seats.
Lastly, even getting the exhaust guides (8mm) has been a challenge on my end- anyone with leads on where I could get the 8mm(inner diameter and 12.5mm outer diameter) exhaust guides?