I'm thinking of replacing my stock exhaust on my 98 2.5L Ranger with an aftermarket cat-back system, either the Gibson 19714 or Gibson 619714 The former is aluminized steel and the latter is stainless steel. Of course the stainless is more spendy and will last longer but I'm wondering if the aluminized will be fine for me. Does anyone know if the stock system of my vehicle is of the aluminized material? Or is it probably not even aluminized? Any comments/advice appreciated.