  I'll never say anything bad about rpm,the products rock. But fast lane machine trans and sealed diff,sounds and looks wicked,Need deeper pockets,but from what Ive heard from owners,which are few,probable due to the price? Say there the best! looks an performance. And of course durability,does it get any better?  I'll never say anything bad about rpm,the products rock. But fast lane machine trans and sealed diff,sounds and looks wicked,Need deeper pockets,but from what Ive heard from owners,which are few,probable due to the price? Say there the best! looks an performance. And of course durability,does it get any better?  I