Kinsler has been manufacturing some of the best fuel injection systems in the world for decades. They offer them for all B, D, H, F, and K-series cylinder heads. Kinsler offers seven (7) different throttle sizes ranging from: 51mm to 67mm. The Port windows and runners can be CNC machined to match your head so that no additional porting is needed. Standard ITB’s don’t include them but Kinsler does offer an "Upper" rail and second set of injectors (pictured) for competition drag racing.
Other options include cast magnesium or aluminum bodies, custom length spun aluminum ram-tubes, back-cut and hard-chrome plated transverse throttle shafts, aluminum throttle plates, bronze throttle shaft bushings, throttle arms with stop and safety return spring, billet linkage connector bar with ball bearings and snap rings, universal nozzle boss inserts installed in "lower" injector bosses, and 8 AN extruded aluminum fuel rail (12 AN available) with billet mounting stanchions make them the an industry leader in Individual Throttle Body Fuel Injection Systems.