Stage 4i looked like the same HP rating as the 3. Dont know what the difference is between the two. I believe mine is a stage 5i. I belive the I means sprung if I remember. Mine is sprung. I think most vendors said stay away from the stage 5 for streetability because they just expected it to be a monstoer on the street. But that doesnt seem to be the case. Vince (do a SN search) has one in his 99FRC with the Futral 408 with spray. He bought it at my recomendation. His was as streetable as mine. The only thing is his had a veru faint squeeking with the clutch disengaged. Im not sure if thats gone now though. His has seen 700 hp and no problems yet.

Mine has seen 700 hp and 720+ ft/lbs with slicks...dumping the clutch at 5000+ on juice out of the hole. It hits HARD and doesnt even think about slipping. The only thing I cannot report is how long it will last. Judging by what I saw when I removed mine...should take some abuse for a while. Its a solid full iron disc. Lots of meat on it. And at that price you cant go wrong.

 

I was reading about them all day yesterday.... and about the i option wich is now the F option.......... From what speed Inc's site was saying the I/F option ups the TQ rating up to 800RWTQ........ Ill either go with the 4I or the 5I.....
Thanks
Kyle

 

SPEC is also coming out with a bad *** aluminum racing unit, with 2 solid iron discs. Saw it at PRI. Rated at 1700 ft-lb.
I think I'll be replacing my Stage 5 with that one.

 

You know the sugested retail on it????? Is it big $$$ like the Exedy??
Kyle

 

Not available yet. They haven't finished up the prototype yet, so no idea on prices. I'm sure it will be much less than the way over priced Exedy. Exedy did have a decent looking carbon triple disk LS1 clutch up there though. You can have one for $2000.

 

I saw that on carolina clutches (I think that is the name) website a couple of months ago and was wondering about that.