Designed by Starr Performance as an upgrade bolt on
to standard LS1-LS6 manifolds.
The standard throttle body tapers down from 102mm to a 75mm
butterfly and outlet. The problem with this however, is the throttle
blade(butterfly) and shaft interfere with airflow, effectively
reducing the diameter of the throttle outlet to much less than 75mm.
It was calculated that the interference caused by an 84mm shaft and
butterfly is equivalent to an open, uninterrupted 75mm diameter
throttle body. Therefore, the performance 84mm throttle body offers
optimum flow for standard Gen III manifolds.
Also, all standard throttle body hardware fits directly onto this
performance throttle body, ensuring simple fitment with no further
accessories required.
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