It's given the car great top end, about 7k up (stock b18c7) it pulls much harder than stock without drop off into the rev limiter. It does go harder throughout rev range, but top end is where it really goes. For a daily driver I wouldn't have minded a bit more mid-range, perhaps that can be tuned in. So for me, a SMSP/Hytech style header with hi-flow cat and stock exhaust has worked great.
This DynoDave header doesnt look too different from my header (mine's not a DynoDave one, different brand)... not suggesting anything bad, rather that it would probably work quite well as per the dyno's in that thread. And in an attempt to be balanced, I have seen the Toda header deliver good results too, plus having inspected one first hand, it's quality does seem very good.
Sorry locote, never had anything to do with 5zigen. If you want to get low 13's, I'd suggest losing as much weight as possible from the car, then pursue power.
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