I used I.S. for my Boost P85 setup last season. Dan/Devin's weights worked really well, the Turbo3 P85 weight curve is nice and if you're looking at the TBA kit then I believe it's the same profile but for P22. The spring they supplied I actually really liked, after it lost tension I replaced it with a VERY similar H5 material speedwerx spring.
I didn't use their secondary setup so I can't speak on that, but the primary setup as it came out of the box was very close and very good. I'm quite picky and was happy with what they provided.

Clutch kits aside, I've used a lot of their stuff in the shop and have always had great luck and craftsmanship on their billet pieces. Got a motor for a clients Axys RMK 800 from them last season and that thing is a hammer, real impressive engine for what it is.

 

No complaints from me. Haven't used their clutching but I have had 3 crankshafts done this year from them. Fair prices excellent work and one was turned around in less than a week!

 

Good to hear, thanks. I ultimately want to add a tune too, but don't see that they offer that....
Want to stay with one company for the entire package.
Speedwerx has what I like now..... but checking alternatives until I decide for sure.
Trail riding & some lake dragging.

 

I have their full clutching. I'm very happy with it. It's not for a boost though. The mountain turbo weights were popular. No idea on those weights. But they do have a lot of people who test their weights so I'm sure there's something to them.

You won't get a tune from them. They are more aimed at making things work well and not creating headaches.

 

I have a used Indy Specialty kit off my SBA.

Has 500 miles on it $200.00 shipped.

It was one of the kits i tried last year to compare and contrast vs our stuff.

 

I have a used Indy Specialty kit off my SBA.

Has 500 miles on it $200.00 shipped.

It was one of the kits i tried last year to compare and contrast vs our stuff.

Ultimately I'll be getting back with you about the SW Stage kit(s) we talked about at Novi. I want the tune + CK etc. I've been looking & reading, SW is what I'm gonna do. Between Christmas, 30 yr anniversary vaca trip with my wife (South) in January and everything else that jumps in the way I have little time & diminishing dollars it feels like currently.