i found headers in ebay for 240$ would it be worth it to forget about the warranty and get it ????or maybe everytime i take to the dealership take the headers out .... i know it will improve my perfomance but i only have 7000 miles on it...tell what you guys think.... also they have the black tail lights on ebay for 150$

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07 BMW 335 E90 (Procede & M-kit)
04 HONDA PILOT EX-L
79 MAZDA RX7 GS
street ported, nitrous rotary engine