The Type 4 engine is VERY particular in its exhaust choice, due to the exhaust port design of the cylinder head.
My A-1 header fits most all Speedster replicas with no issues at all.
I am also finishing up the production of my "Econo header" as we speak. This header is designed to be a low cost, effective system for engines up to 2.1L
The retail price of this system is 450.00 and we should have a run of them done by the end of this month. I have been testing/developing the prototype since early July, 2005.