S-bolt Fabrication How-To
Click the S-bolt pic to see the engineering print
Thanks to Mike Clark for the S-bolt photo!
Not much to this mod really. The reason for replacing the stock bracket assembly becomes obvious when you see it. The bracket that holds the air hat actually blocks a portion of each throttle bore. Not a good situation for performance. The overall height of the S-bolt you'll need will depend upon the air cleaner element you use. If following the FABM recommended part numbers the engineering print (click the S-bolt pic to the left) will give you dimensions. There are a couple of givens. The offset from the throttle body threaded hole to the center of the air cleaner is 7/8". The thread is a 1/4 - 20. Threaded rod works fine but if you're doing this by hand as I did (using two pairs of pliers or vise grips) failure to hit the correct offset on the first shot can result in weakening the rod and breakage. I used a 2" center to center U-bolt. The unthreaded center section is much stronger.
Back to FABM page.