I'm looking into Throttle Bodies for my upcoming engine build up. I'm building a 385 Super Rammed motor and am looking for a 58mm TB. I just want to know about experiences and opinions on these three or any others that are good. Thanks

 

I have a BBK sitting at home. It has sort of a built in airfoil, but I think they could have done a better job of casting/machining it. I spent a couple hours cleaning it up. Also I enlarged one of the spot faced areas where the lower bolts are, it was slightly offset of the hole and my ARP bolts wouldnt fit in the recess. The bolts they supply fit fine though.
Aside of that, it seems like a pretty good piece.

 

I have an Accel billet 58mm and it is very high quality.

 

I have the 58mm BBK on my car...I Havent had any problems with it. Just go easy with the small screws holding the Idle air motor piece on. If you are not careful its easy to strip or cross thread one. IMO I would buy the cheapest one.

 

I like my Accel one. I believe that some flow 1000 CFM and others flow 1050 CFM. That would be the only major difference in them.