I've been using these APP (or is it AAP) Performance headers/teflon tube units from Central Hobbies on my YS engines and I'm impressed... but must say they've been Hyde mounted engines.

I do use a DB softmount on my OS 1.40 powered Focus. Wanted to keep the cost down. The problem is the DB mounts wooble in every plane, ie vertical, horizontal and rotational...hummmm not so good for headers not to mention your thrust angles. They definatly benifit from a nose ring and tail lock... limiting vibration to the rotational axis. Heaving said that, I personally won't use one with a YS/hatori set up.

There is a cheap way out though. Take a broken Hatori header and cut of the flexi part, leaving just the solid goose neck. The braise a 2cm piece of 15mm diameter pipe on the end. Connect this to the muffler with a, say 20cm teflon pipe. Works very well. The teflon is stiff when cold but after a 10 seconds of engine opperation becomes very soft and flexible.

I don't use any header support the YS YS engines regardless of which header Im using. I believ it's better to let them move as much as possible with the engine instead of trying to restrict them.

Ring Central Hobbies and get one of those APP headers. You'll get more power also!