Does anyone have a before and after track time or dyno on what the gains were after switching their stock (steel for 2.73 cars) driveshaft to an aluminum one? On the same topic, what is the part number for an aluminum ls1 driveshaft?

Thanks

 

I gained 1 mph with a 3" aluminum DS over stock in my '95 Formula. And it didn't beat me to death over 85 mph anymore.

 

LS1 Driveshaft part # is 12564004

 

Thanks. Does anyone think it would be worth the gain to switch? I have seen some used driveshafts go for ~$150. I am going to see what kind of discount my dad can get on a new one.