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:-) My car is running VERY healthy at just under 15 psi. Last time out in the cold (around 38 degrees), the Powermeter was reading 348 hp when it normally reads 20 hp less. I'm expecting to try to get a pretty accurate reading right before I put the test pipes on and right after (same road...same day...etc.). It should give a good idea of the gain in hp from doing test pipes. Although, it won't tell you anything about spool up. That will be told by the feeling of the seat on my back. :-) As far as the tires, I group about 3 or 4 tires in the same class...Pilot Sports, S03 Pole Positions, AVS Sports, and Toyo Proxes T1S's. I don't think you can go wrong with any of them. I love my Toyos. :-) A street tire after a certain amount of hp is just not going to grip as well, but that goes for any tire. I'd e-mail dogpile. He should be able to get you the rears for under $500 shipped. I've gotten two sets from him. :-) He gave me a full set for $790 shipped which I don't think you can match anywhere.
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