Overdrive options

According to GVOD and Strange engineering it isn't. I've brought it up with both of them. Now mine specifically is a 4.56 gear with the OD. I'm assuming most guys aren't going to far past that. I don't know what else to tell you. mines been together for the better part of 2 decades and drag week and power tour speak for themselves. I run 28" tires for reference since I didn't mention that.

I don't really see the need to go higher than 4.56's unless your car turns high RPM through the traps or had really lack luster HP. If I had to do it again I'd run 4.30's. 4.56's are on the edge of too much gear for my existing combo. I may got to a 29" tire though.