SpeedFactory 70mm Cast Throttle Body - B/D/H/F Series Cambelts The other option is using

The other option is using the provided blind hole you can easily tap the head for the second hole

Includes Magnetic Drain Plug to capture any metallic debris/fragments in your cooling system

and full warranty policy

Stainless Steel T304 construction for corrosion resistance and clean stylish look

-Core size is 18"x12"x6"

SpeedFactory 70mm Cast Throttle Body - B/D/H/F Series Cambelts The other option is usingSpeedFactory 70mm Cast Throttle Body B D H F Series Introducing SpeedFactory Racings precision cast 70mm Throttle Body for Honda B, D, F, and H series bolt on increased airflow, throttle response, and power gains on both naturally aspirated and forced induction applications while retaining smooth throttle operation, drivability, and the ability to fine tune your idle with the plate position & idle air adjustment screws. This is our recommendation for