Ron, I have an ordinary Performer on my car and it pulls hard well beyond 5500 rpms. By 7,000 it's leveling off, but that could be any number of factors... like those pesky catalytic converters. I imagine boost might change the equation a bit, but I think the Performer is good for more RPMs than Edelbrock tells us. Probably not as good as a dedicated high-rpm intake, but it's not like its done at 5700 rpms either.
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