No they aren't worth it. The only itbs worth a shit are kinslers or jenveys an those are $1800+

you have to have a really nice motor that would benefit from itbs over a properly porter manifold. I can count at least 20 people making over 230whp with a $100 aebs manifold with a $200 port job.

So unless you are anywhere near that powerlevel it's not worth it. And they don't make peak power they make power under the curve mainly midrange. They were designed for road race cars not drag race