As seen the manifold to intake runner line up is slightly off....others and myself have sanded down the manifold to meet the intake runner better....same goes for the TB to manifold, the plastic mold kinda protrudes a bit and can be sanded down also making a smooth inlet...
I have polished my intake runner...want to
in for more
http://my350z.com/forum/intake-exhau...-clean-up.html