I'm using the 2.5i n/a manifold from modded from outfrontmotorsports.com. They have an aluminum spacer that I'm using that is as I can recall 13mm. With the spacer it barely clears the avcs solenoids. Btw outfront made custom spacers for the aeromotive top feed fuel rails to fit the Fuel Injector Clinic 1300cc injectors. You can also have kstechnology make a custom set of phenolic spacers for you. You just have to be sure how thick you need them to be to clear. Just contact either one of them.
Pics of clearance after the spacers: