CAL

Just recently put on Stillen Headers & HFCs & UpRev tune on my '09 Sedan xS and got it dyno'd.

I gained right under 40Hp to the wheels which is pretty impressive considering I have the x model. I can feel quite the difference as well as love the way it sounds.

PREVIOUS MODS:
ARK Dual Grip Exhaust
Stillen Oil Coiler
Stillen Gen 3 long arm intake
Hotchkis sways
20'' Vossen CV3
BC racing coilovers


It dyno'd 320WHP. Pretty pumped. I will post pics and dyno chart soon.

What are your thoughts on the gains?

Dj1ofDet

iTrader: (5)

It sounds like that's a pretty good gain, considering what you paid. Somewhere in these forums I read that the headers and HFCs combo aren't a good idea on the G. I wanna see some before and after dyno charts and pics... so anxious!

DeepRumble

I would think the HFC's would benefit quite a bit, as they are a bigger diameter to allow more air flow. I have also read though too that the headers don't make that much of a gain. Either way, 320whp is a great number. What was your TQ number?? Can you post a graph.

Gville37

iTrader: (1)

any vids, pics or dyno sheet?

Austin713

what was before and after? that will give us a good idea of where the Dyno is calibrated at. was it a dynapack or what?

taek

iTrader: (3)

40HP gain is too good to be true ...

fastlane45

iTrader: (2)

How does your setup sound? Do you have any video?

FlorezBethel

It sounds like that's a pretty good gain

qb37Xs

iTrader: (3)

Dyno chart please.

TheLocNar

iTrader: (5)

Did you dyno with the other mods beforehand?

jmurbas

I was told by a reputable exhaust craftsman with good, ahem, intentions that the stillen headers are proven to not add any power (as he talked me OUT of his headers for my sedan, so no competitive BS going on)

Regardless, IM very happy you are seeing and feling good results. Lots of $$$ spent there and we all need reassurance it's worth it. Sometimes that comes from others just saying, "way to go"! Other times, it's a woman asking to go for a ride, and as you open the car door, she shuts it and says, "No, not your car......YOU."

I just ordered my FI resonated 2.25 HFCS and full catback exhaust with new x-pipe. Won't be here until August but that gives me time to figure out where I am taking my 09xs for uprev tune.