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It looks like the guy that did the header install must have screwed up on the first dyno pull. Maybe he put in the wrong inlet temp or maybe the car was hot, but now your numbers are closer to mine as far as what you picked up. You have a better inlet and a tune and it shows.
Before:
yours: 335 hp and 338 foot pounds
mine: 334 hp and 323 foot pounds
(your car made quite a bit more torque than mine did stock, maybe I was getting some timing pullback due to it being 100 outside when I ran)
After:
yours: 369 hp and 363 foot pounds
mine: 360 hp and 362 foot pounds
Increases:
yours: 34 hp and 25 foot pounds
mine: 26 hp and 39 foot pounds
You are making more power and the same torque as my car. The LG's seem to give me more torque with a little less hp on the top, but I think part of the reason you made more power is you are running a better intake plus you got a tune.
I'd be VERY HAPPY if I were you. 369 are great numbers for an A6 with headers and an intake. Plus I think the 160 stat makes the car more consistent.
Great job!
Glenn
Question: do you need to re-tune a dyno tuned car if you decide to change to a 160 or 170 degree thermostat? Or, is it ok to just readjust the temp when the fans are to come on?