HPi Milwaukee-Eight® throttle bodies are designed to allow more airflow over the stock 55mm throttle body.  
 
HPi M8® CAST units are offered in 62mm, 65mm and 70mm size.  The throttle body is manufactured out of cast aluminum and include a fully CNC ported aluminum intake manifold. 
 
Other features include:
Stock location for air cleaner bolt pattern
Cruise control compatible
Includes fresh rubber seals (utilize stock flanges & throttle body bolts)
Made in USA
Same routine as the earlier Touring electronic throttle-by-wire units, HPi utilizes the stock core electronics, and new units are turned around in about 5-7 business days.
 
Send in stock throttle body. We make sure the electronics are properly working, then surgically remove them & give the stock body a proper burial. Stock units are tested when received to ensure stock electronics are working properly, then re-tested after assembly to assure everything was assembled correctly.