those are fine, you just push the fuel line into the hole in the muffler, its that easy and it works fine i have 3 of those pipes. that air filter is too big for the carb, you need a 10-11mm. that header and pipe work fine.

here is a good place to get parts from, i get all mine from this place

clutch bell: http://www.clermontmotorsports.com/s...-vented/Detail
shoes and spring: http://www.clermontmotorsports.com/s...-spring/Detail