no...not really...

now, header, cams, and tuning would work good if it was a nitrous application or something to that affect...but just header cams and tuning...id say you'll be lucky to get 20whp(and think of the cost of it)

if your dead set on the header, save yourself the money, and buy a 30 dollar cutout...itll lessen the exhaust backpressure probably as much as a header would, and youll probably see around the same gains because with the cutout open youd bypass the entire exhaust from the cutout back.