Alright i have a 2000 ls with dc sports 4-2-1 header a 2.25 carsound cat and a usdm itr catback(bottleneck NOT removed). i'm planning to add a 55hp shot of nitrous ... will my current exhaust system be restrivitve when i spray ?

 

It will be okay to use the current exhaust. Remember, that most of the time you drive, you won't be using nitrous so it wouldn't make it worthwhile to upgrade to larger diameter exhaust.

 

im not completely sure, but i heard of cat. converters getting clogged when using nitrous...