Two questions here: 1) I live in Colorado. It's very dry here, but the DOT uses lots of salt and mag chloride to melt ice on the roads, which has proven to be corrosive for the undercarriage on previous vehicles. Is it worth going with the stainless version, or will I be ok with the aluminized? 2) How noticeable is the loss in low end torque on the 4"? Enough to go with the 3.5"? It's worth noting that I don't have a CAI or a Tune... Thanks for your help!
1). In any place that uses salt during the year, we recommend getting at least a 409 stainless system, if not a 304. Salt can really eat away at aluminized kits. 2). Not overly noticeable. You may feel a slight dip, but it's not usually enough to effect your overall drivability.