<center><img src="http://pictureposter.audiworld.com/711/guess.jpg"></center><p>to do so but I think I might manage to stump you on this one.

Hint: this part is NOT used on an Audi but rather to help with machining something for an Audi. It's size is 7" x 3.75" overall and it weighs 13.4lbs. The 4 threaded bolt holes are 93mm x 46mm c-t-c and use 8Mx1.25 thread pitch. This one is for a VERY specific use however I do use a similar one that has 4 repeats (5 total) of this pattern machined into one 1.5" thick billet of 7075 aluminum that is 7" x 38" but it weighs 77lbs and is too big/heavy to do any kind of detailed picture.

Go ahead take a wild stab at it.

PS; I'll try to clean the pic up as the threads somehow got distorted in the pic poster.

The threads seem to form the right "square" for mounting a throttle body to it. So maybe this is your "jig" for mounting a throttle body to? This will help you to do precision bore and honing?

Bob K.

This is a jig which all the new "race" throttle bodies will be machined on. My larger jig holds 5 throttle bodies which I can mount to it, hit the "go" button and walk away while the mill bores all the primaries over-size to accept the internal velocity stack.

This one needed to be separte from the 5 TB jig and I didn't want to just cut off one of the jigs from the larger one as doing 5 TB's at a time is more efficient than 4.

Additionally this one can be bolted to the mill table via the larger thru-holes at each end or clamped into the milling vise as unlike the Stage 3 throttle bodies this jig when holding a race throttle body will need to be rotated in a 4th and 5th axis.

Way to go! Next time no hints ;-)