hey i just wana kno if u guys can help.....i barley joined up

i have a 89 supra turbo n i plan to get
-bic divorced downpipe
-catback exahust idk which 1
-apexi intake
-test pipe

i was wondering if i should do sumtin diff or just keep it as planned



also i was driving my car today n i got it to 118mph is that normal?????