I use the Professional Products Crosswind vortec intake.
No problems or quality issues, big power. A great intake manifold.
At least equal to the edelbrock rpm.
Your quality statement with this manifold is unfounded.
Many of the junk intake manifolds (reguardless of brand) and a lot more. sold on ebay is seconds or stuff that was sold off for scrap by the manufacturer and not intended for resale.
The problem is not the manifolds its the ebay sellers passing of junk defective scrap for the real deal.
The edelbrock RPM vortec and the GMPP eliminator dual plane both have provisions for hot water plenum heat. The air gap does not.
It has to get real cold for this to be an issue.
Too hot a carb or manifold is much more of an issue most of the time.
Last edited by F-BIRD'88; 05-22-2012 at 12:07 PM.