I have several questions about the ATLP quad exhaust system for the 2008 acura tl type s. The exhaust system cost $1100 and i wanted to know if what was included for that price....the exhaust pipes and tips? Does the stock tl type s exhaust have a cat converter and Jpipe and resonator? And if it does have thoose things can thoose parts be used with the ATLP exhaust system or do i need to purchase another Jpipe and Cat converter? By just purchasing the Exhaust system i will get the increase in hp and the exotic sound it has correct? Also where is the best place to purchase the ATLP quad exhaust system for an 08 acura tl type s?