98gsr
New Member
i know this is retarted to ask probbaly but ive just always been curious about it...ok so you know how many aftermarket exhuasts like the ws2 or evo2 are 2.36" and they say they are bolt on to stock cat and go ?....but isnt stock cat like 2.00" to fit the pipe? i know that probably sounds confusing lol but im basicly saying ***how can the exhuast pipes go from like the stock 2.00" to 2.36" and be all bolt on with no extra cutting or welding?****