Injector Valves

[Christo Atanasov]

This is a multi-part message in MIME format.
--
[ Picked text/plain from multipart/alternative ]
1) Is it possible to replace 026 133 551 injectors with 035 133 551 F?
what's the difference between them?

2) I plan to rebuild my HY Cylinder Head, and I wonder is my intake valve bigger than exhaust? If so is it reasonable to port exhaust valves so I can change them with 5 new intake valves?
Is there bigger valves for 5cyl 10v NA engine that I can use?

3) Is it good idea to polish my manifolds?

10x
Chris
--