| I've searched thoroughly already on each of these turbos. I still can't decide on what way to go. I have all the supporting mods.. (Dual Pop, 740cc Injectors, Stillen Intercoolers,4 bolt 3" expansion DPs, Test Pipes, 2.5" SZ exhaust, etc..) Initially I had decided that the sp500 would be perfect because of the stock like lag and that I would be able to keep the 4 bolt expansion DPs that I already have, but I'm afraid that I will outgrow them quickly. After searching I'm finding more and more data suggesting that with the MS manifolds, even the 700s with the .64 housing are suitable for a street car. I'm not planning on rebuilding the motor yet (95TT 85k miles), but I will get the MS manifolds regardless of what turbo I choose. I'm leaning towards the 530s because of the instant response they appear to provide, but then I look at dyno sheets on 700 cars and I see that the power band below 5k is similar which throws me off. ??
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