I've got the free maintenance(free oil changes every 5000 miles) with my evo. If I put a DP and Catback on they're gonna see it when I bring it in. Are they just gonna say, my warranty is toilet paper and put me in some blackballed computer list?

 

very unlikely... free maintenance are warranty are two different things
they'll still change your oil for free (make sure its synthetic tho), but if anything bad happens to your car that requires repairing, they will not pay for it under your warranty

 

yup warrentee will be trashed but you might still be able to get the maintanence stuff done

 

I was told by a service manager that they make note of everything modified in case there are future warranty issues. You will get your free maintenance but you may have warranty problems in the future.