I have done a search on this site and a couple others and really couldn't find an answer, and I can't really figure out the big difference from the language on Centerforce's website either.

Any insight? thoughts? recommendations of these 2 models?

I will be running between 600-700 rwhp, depending on pulley size I use, but will use street tires and a TKO 600 for street driving only... no 4000 rpm launches with slicks for me... at least not for now.

thanks

I've been using (& maybe abusing) an 11" dual friction for nearly 10 years. Even with occasional 200 hp nitrous shots & 1/4 mile blasts (on street tires) I've had NO problems. Before that seemed like I was changing clutches more often than tires.

Don't know anything about DFX.

Just got a reply email from the Centerforce sales rep.... thinking maybe I will go with the 12" DFX.

Hello Dave,
The DFX ( DUAL FRICTION EXTREME )in the 11" application will handle up to 850ft.lbs. of Torque to the Crank, more of a racing clutch with 6 puc sprung hub w/ metallic button material, hooks up faster than the DUAL FRICTION and not as street able. The 12" application with part number DF612909 will handle 700 ft.lbs. of Torque to the Crank and a very street able clutch. The DUAL FRICTION will handle up to 625 ft.lbs. of Torque to the Crank.

You want a Mcleod, Street twin :cool:

---Bill.