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IMHO:
Gen 3 > Gen 2 under these conditions:
Stock vs. Stock
BPU vs. BPU
As soon as you take the head off the engine, and start doing cams, porting, forged pistons, ems etc. they become equal, or the gen 2 has a slight edge, due to better parts supply chain in North America. Then there is the fact that a ported gen 2 head can ultimately flow more than a ported gen 3 head, with it's smaller ports, which are a compromise between low end and peak power.
In summary, know what your ultimate goal is in advance. If you plan to stop at 300RWHP, and that's all you will ever want, by all means, buy a Gen 3, it's the most economical solution, for someone who doesn't already own a Gen 2, or even someone with a blown up Gen 2. For someone who knows they will eventually want more than 300RWHP, you are better buying a Gen 2, and putting the money you save toward an EMS, turbo kit, upgraded intercooler, etc.
Best regards,
Ken
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