Stillen Headers installed - Review/Pics/Vid/Dyno

semtex

I like it. I'd prefer the exhaust to be a little throatier sounding, but it's not bad as it is. It stays quiet until you step on it. I suspect that most people think this is actually a good thing, but I guess I'd just like a little louder all throughout the band. It was throatier sounding and louder in the low to mid range with the stock headers. I'm eager to get a dyno tune though. I suspect that as much gain as the car as made, there's still a good chunk of untapped potential. The UD pulley goes on next, then a tune.

I'm not sure I'd call piggyback units a 'hack job'. I think it just depends on the quality of the unit. I do prefer ECU reflashes though. They just seem 'cleaner' to me, if that makes any sense. But ECU tuning is definitely not my area of expertise. In fact, looking at the AFR data, I noticed that the line slopes downward as rpm increases. Does that mean it's getting leaner as rpm climbs? Or richer?

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"There are no small accidents on this circuit." -- Ayrton Senna
316.8whp & 248 ft/lbs (Dyno Dynamics) | 319whp & 256 ft/lbs (DynoJet) (04/23/10)
Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.