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When I did my turbo install I gained just about 1697.13 hp whoa
but of course this is just an estimate
Sorry I can't help myself.. but seriously, there are gains to be had with aftermarket exhausts and you should definitely consider it. Keep in mind anything for a GST (NOT GSX) will fit as they're the same post-cat between the NT and Turbo models. Personally I went with a 3" GST system from Ebay (SRS brand) and it's awesome. I lost low end power but gained a bit up top, and when I went turbo it was perfect. If I planned to stay NA I'd go 2.5" max. Look at the ebay exhausts, they're like $200-300 shipped and the quality is great. I've gone to two different exhaust shops to get work done to my downpipe and the techs at both places were impressed with the quality.
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