BE LS and Ford Manifolds can accept a 6500 Accufab throttle body.

If you don't already have throttle body, a Accufab 6500 throttle body with 2.500" butterflies will flow significantly more air than a 4500 with 2.250" butterflies and result in more power across the board for engines approaching 800HP or above. 

This machining will also work with 2.550" throttle butterflies. 

The service includes machining of the larger throttle bores and hand blending of the plenum to the new larger throttle bores and carb pad opening.