I'm about to reverse the manifold and fit parallel rails to my bug
Don't really need the rails (yet ) but they make for a tidy job instead of the standard mish mash
While I'm doing it I thought about manifold spacers
The question is , how thick spacer is recommended ( or how high can you go) and is the thermal benefit really an issue ( anyone know the temp difference)
again I don't need them yet but if the temp aspect is not really an issue I'm just gonna extend my manifold while I'ts off ,,, ,again!
Then it's another job done ready for future mods

Tony