I've got an opportunity to pick up a ppe standard axcellerator for 450 bucks tommorow. It's 9 months old. Hardly used. It's the one with 5 levels that goes up to 225 horse. Is 450 a gd price? I need better fuel mileage with my 07 Lbz also am I looking in the right direction? How bad is the smoke with the ppe in higher levels? And what should I stay away from with the stock motor and 6 speed ally?