| I think 450rwhp on pump is pushing it for the 530s. Note: I have NEVER DRIVEN a Sp530 car. 450rwhp is easily obtained with the Sp700s. Take a look at my boost and dynos, these are PRE-TUNE: 
In my experience, you'll need something to step the boost if you plan to run over about 17#, as it hazes even 3rd gear around the 18/19psi mark. I use the profec B switch-controller to change between low-boost and hi-boost when equipped with race gas. In my further experience, this car is not an autox car, even with the boost left at the base/off setting of ~13psi. I've tracked it a few times conservatively, but plan to drive 4 events in the next 3 months; however, it was VERY trackable so far, and will only get better as it gets dialed in and I get more confident with the power. If you try to run an Evo on a sidestreet from a street start with the 700s, you're going to get walked. It barely holds traction at 13psi in 2nd gear with my 295 rears. As for reliability, the only thing I've replaced was my aging NA differential. I'm gentle on the shifting and clutch. My tranny was a used one with mileage unknown, but with synthetic fluid and regular flushes, it has an additional ~20000 miles on it with no grinding. Let me know if I can help further,
SS
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07:20:00 08/24/07
Which brand/design of downpipes? - 
