The Performer X looks like much more of a naturally aspirated manifold than the Victor X (B-series manifold). Actually, it seems rather small in all respects. Seems it would be good for low-boost turbo systems as well as moderate NA buildups.

If you're pushing a lot of power I'd look for something more aggressive.


I can easily believe the power gain on virtually any buildup, considering the design of the OEM d16 manifolds. You'd pick up horsepower even with just I/H/E.

I wonder what the bore of the manifold is. :thinking: