I have an 09 silverado 1500 4x4 crew cab. I dont know much about the mechanical side of trucks, so I'm hoping to pick everyones brain on modifications before I put them on my truck. So far all I have done is put a flowmaster exhaust on it, but I will be posting some questions soon. I look forward to everyones advise. ---------- Post added at 12:21 PM ---------- Previous post was at 12:12 PM ---------- I think my next mod is going to be a cold air intake. I know K&N is very popular, but I have been reading about the Volant with the power core dry filter and the Injen power flow intake. I like the idea of a dry filter. Injen seems like it is more custom tuned to specific vehicle, but Volant is advertising more horsepower and torque improvement. Has anyone tried either of these on a newer silverado 1500. I have an 09 with the 5.3 V8.