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Discussion Starter #1
Strongly considering the kpe tune with the transmission option for my 2014 platinum xts. I love this car but without the v-sport it's really sluggish when carrying passengers. Does anyone have any thoughts on clarifying the difference between the kpe tune and the trifecta tune?

http://trifectaperformance.com/trifecta/

Or

http://www.kpe-products.com/?s=Xts&post_type=product

Both seem similar although not clear if the trifecta tune includes the transmission tune.
 

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Discussion Starter #3
I actually looked at that as well but it seems they only have a tune for the v-sport engine not the standard 3.6.
 

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2018 CT6E, old: 2014 XTS Vsport, 2005 CTS-V, 2004 CTS-V.
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2,696 Posts
I'll be getting Trifecta as I used them before on two other cars and have the cable to connect to laptop. Trifecta or BNR does the ecu and transmission(tcu) and sends a modified version of each. The shifting is nice and responsive with no jerking or abnormalities.

With Trifecta/BNR you give them your VIN, they send you your updated stock file and the modified tune for both ecu and tcu, you data a couple of runs and send the file in, and they return the new and improved tune with a nice bump in performance.

The hidden transparency mode is a real peach!
 

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2013 XTS FWD Premium
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X15, are you saying that putting premium in your XTS gives you more pickup or did you have one of these tune ups and then started using premium?
 

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Discussion Starter #12
I have tried that. After filling three times with 93 I noticed no performance gains although my mpg dropped ! The KPE tune was easy and definitely made a difference! I never felt the car was fast nor slow when driving alone. When I had passengers with me you could feel the engine struggle a bit. That's gone after the tune and it's all out peppy even with 4 adult passengers but without a tune to take advantage of the higher octane you won't see a difference. On the flip side my mpg actually increased about 1.4 mpg after 900 miles average.
 
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