GT2 ftw! i have a full system challenge sport + GT2 and boy its loud under WOT! in normal driving i would say its about the same as just the GT2 maybe a bit louder.
i would say go with the GT as its not that loud compared to the GT2 and you can always add an x-pipe for more sound and power
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ESS | Challenge x-pipe | Akrapovic | Stoptech BBK (380/355) |Ohlins R&T | Dinan | Vorsteiner | Downforce USA | Varis Diffuser | Gintani | UUC | BMW Performance | Macht Schnell | Forgestar F14's SDC 19x9.5F 19x11R | 255.35 295.30
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