Properly done, they are the best looking system in any jewelry box. There are some things to keep in mind.
EFI TB's can be built to look exactly like the carbs. Only a really sharp eye will see the difference. BUT, EFI is so much easier to tune, and more fun to drive. Especially here in the Rocky mountains. If it's a show car, it doesn't really matter. But if you actually enjoy driving the car, get EFI.
For a max effort race engine, IR systems can limit your power, because they can limit air flow. Not a big deal to most people.
The engine needs to match the IR intake system. You can't just slap the manifold on any engine and expect it to work. Especially the heads and cam. Make sure the components match.
Accurate linkage is critical. I messed with mine for a long time. Eventually, I threw out the manufacturers linkage, and built my own. After that, it was much easier to balance and tune.
IMO, the real goal with stacks is looks. I think they are the best looking fuel delivery system in any jewelry box. Pay careful attention to individual components, and make sure they match your goals.
Picking the right computer is more important than picking the right hardware.
These "Tea Strainer" filters cost me 100hp on the dyno.
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