not to start a flame, but i have had great success with the C&L, and have heard alot of things bad about the PRO-M shorty, it is hard to tune, doesn't offer the adjustability that the C&L has, and cause alot of problems when dyno tuning a blower car. I have the C&L with the blower and love it, i can't see spending the extra money on a pro-M, maybe i am just lucky.
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