I'd have to say that the most popular are FTI, Comp Cams, Cam Motion, Bennet and Anderson. Off-the-shelfs don't seem to do the trick; you've got to start looking at custom lobe profiles to really get the most out of the combinations.
I'll be running all the FFW events this year...look me up at Cordova.
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Jeff Chambers
Trophy Stock #3
11.97 Seconds / 114.5 MPH
Chambers Racing Team