Roush Body Kit ?

[06stang_tn]

I just purchased a Roush body kit and here is my question. Roush Perf. states that you must purchase there exhaust system for the rear valance. Is this true or can I just purchase the tips (as they do sell just the tips) and use the stock exhaust system? Thanks in advance for any information.
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2006 Mustang GT Convertible

 

[bigcat]

i am pretty sure you can just get tips.....