Do a search for them. Quite a few people running them and lots of positives. Quicker spool up, lower egt's, better mileage. The helix 2 seems to be one of the most popular choices and I personally like the idea that it's a fresh billet, not a regrind. People will argue over which is better and really it comes down to your personal feelings on the issue. I want my cam to be fresh but that's just me.
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