Are you refering to the 70mm throttle body and upper plenum? If so, I have been running it since
1999 and have not had any problems with it.It comes polished so it looks nice also.
Some run the stock size TB? Big cube motors might benefit from using these? Some have said the 65mm is the best size to run on a street car? Jay Jackson does a nice inlarged TB (62mm) with the rear section machine out to 65 mm. A lot cheaper than the other ones. Your choice. Gene
For what its worth, you can run in the 10's easily with a stock upper plenum and throttlebody. You might be a lot better off spending your money elsewhere.
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