Quote:
Originally Posted by tooter
You could still make an adaptor plate that smoothly reduces to the stock diameter. You already have the perfect pattern. It's on the bottom of your 1ZZ throttle body. 
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That would be the next logical step, but I was thinking from the "bolt-on" side of the garage. Not everyone has access to the facilities that we do. =)
A few alternatives (of varying feasibility) would be: buy a 50mm throttle body spacer and turn/grind the taper; scavenge the intake side of an xB kit and use the tooter TB flange; scavenge the intake side of an xB kit and make your
own elbow/flange; learn to do lost-wax investment casting and make your own; etc. etc.