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All right everyone, sorry for the delay.
I put 350 or so miles on the car after the 987 airbox and ben plenum/big tb install. It feels significantly stronger and the sound is better/louder than the desnorkeled 986 box i had before. I felt from the midrange up it really woke up the engine. From a "feel" perspective, this has been a wonderful upgrade.
Unfortunately I only got 3hp and 3tq according to the dyno (223 hp up to 226, 196tq up to 199). Temps were within a few degrees of one another, humidity was similar. I was quite surprised about the results. In order to better understand if my car is an anomaly it'd be great to see the results from a couple other cars.
The dyno guy (Hutter performance-- typically a GM tuner, but they had, of all things, a 962 there for a tune when I was there. They're a really well-respected shop in Northeast Ohio) said there was room for more power if I got a tune, but he didn't think there was a lot there to be gained.
So the numbers don't appear to be there, on my car, anyway, but if I hadn't gotten it dynoed I would've thought this was a solid 15 hp+ upgrade. Wish I could have reported a more positive result, and I hope I am an anomaly! I'm still very happy to have done this, though.
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