Alright Iam looking around for exhaust setups and was wondering about this exhaust, Is this a catback? online it says two different things. Is it a direct bolt on to stock? Would the zpi spipe fit onto it? And is it stainless steel? And also in general anyone is this considered to be a good exhaust I mean it def looks good.

all stainless, axle back, direct bolt on, gain 4 hp dynoed, good quality anyone correct me if i'm wrong

ic so its only an axle back for 500, is it 2.5 inch?