I agree completely! I think if he puts that single plane on and drives it, then changes to the other, there will be a noticable difference in performance that can actually be felt.
A plain old performer is not that spectacular of an intake. Neither is the streetmaster. With a 318 on an actual dyno the performer might show some improvements over the streetmaster, but you won't notice a darn thing with a stock 318 driving around town. Maybe if a lot of towing was involved the difference might show up on the low end. But otherwise, not so much. Even towing, it's not like a 318 is going to tow heavy at low rpms.
