Had both roots and pro/c the pro/c never made the boost so i went up to a D1 which sounds like a bucket of bolts at idle ,customer service was a joke .as for the roots type bolt em on a go never had a breakdown .

Couldn't agree MORE. ProCharger just sucks, the product and the Company. I purchased 2 procharger systems for my Boat, the worst decision I have ever made. Tech. support, Customer service- if you could call it hat - the worst, after a year of battling Procharger ripped them off my boat and put Roots on. My story 10 pages long with them. Oh by the way did I forget to mention it was all my fault. Well of course according to them "I'm not qualified." Either was the Engine builder, or the Dyno it sat on for 3 days. Pro Charger - the worst I have ever dealt with.

Prochargers rock!!! Been down the roots road won't go back...

Prochargers act like N/A at idle and low speed then scream at speed. On my second boat w/M-4's .....