Hey Rende,

Check out the dimensions for the MACS models "1060", I think they were called. These were for old school high rpm 60s. I think these days they are marketed for 8 - 10cc engines.

Anything with approximately these dimensions will be fine for your VF.

Remember that the length of the pipe plus header dictates the RPM at which the combo is useable. The engine capacity and nitro percentage dictate the pipe volume required.

There's more to it than this but it will put you in the ballpark for getting a useable set up.

Don't be fearful of experimenting either.

DF

Oh, your Hanno Pipe is for low revving long stroke engines, hence it's longer.