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I noticed a difference with a catless JDL UEL header and an OFT tune and my car is a 2017 with tunes that aren’t doing the same as the 13-16 model year tunes. The current tunes available for the 2017’s aren’t as sorted out as the previous years. Shiv is working on new 2017 tunes that will be giving another 15 or so lbft of torque in the midrange and a few more ponies up top too. My point is the tune I’m on isn’t quite up to par with the earlier years and I still noticed a difference. Not sure how much different the results are with a catted UEL header though. The biggest difference I noticed was in the mid range. The torque dip was obvious to me, and it’s mostly gone as of right now of my car.
Just noticed that yours is a 2017. Is yours manual or auto?
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