I currently have three two one of these intake adapters available. This is a blem intake with quality thread inserts (not Helicoils) in six of the 351C bolt holes, for $539.
The next production batch of these that I get will have a big price increase, because of a price increase on the raw casting from the foundry. Right now I'm guessing they will go up to around $650. If you want one, now is the time. Leave me a message here, email me at jayb@fepower.net, or call at 952-428-9035. Thanks!
