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better manifolds that rival what the Greddy's come with (like Specialty-Z inconel manifolds), will not only help them spool up a lot quicker, but equal the power that the TD05 16G kit puts out. On the only reported dyno comparison of his manifolds, not only was there a max torque difference of 77.1 ft lbs and max hp difference of 60 horsepower (59.6 to be exact) just by bolting them on (this was before tuning by the way), low end power was improved by an amazing amount too. You can get the 2530s for about $1000 less than the Greddy kit, right? Put that money toward the inconel manifolds, and not only will you not have to worry about cracking issues, you'll have a more driveable car with probably equal top end power. And you can reuse your 5 bolt downpipes.
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