JB4 Doesnt require a custom map. For plenty of users map 2 is good enough. If you want more or car isnt smooth then yes i do recommend it.
IMO If i was on jb4 I wouldnt go catless. I just wouldnt want to neglect the CEL on the dash. Ive had quite a few people have a serious issue that was...
would love to get these back end parts on a customers car for feedback. Hit me up if you are willing to do some pictures and ill get you a good price. I think they look badass.
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So where are the track times? lol Theres so much you could have done to promote the product as you agreed to. You are the exact reason why most companies wont sponsor people. Entitled smh
Wish you best of luck but i know most of us vendors talk.