I'm not sure who can help me with this question but will throw it out there

Some of you will know that the Spec C manifold is a one piece unit, unlike the STI manifold which comes in 3 different pieces.

It comes with the TGV delete, which improves flow.

I've been informed by various sources that the spec c unit unlike the STi one will only accept the OEM fuel rails and no other aftermarket rails.

Without having a spec c manifold, i can't test this theory.

Can anyone confirm this?

Thanks