I'm running the 484 purple shaft in my Duster with a 2200 Mopar stall, a 489 case power lock with 4:10 Richmonds in it, 225/60/15, from a dead stop,when you mat the gas, you're going to let out of it, quick, because it starts to come around, INSTANTLY! Now on the other end of the coin since I upgraded to 295/ 50/15s I need more stall! Lol