which exhaust is showing the best power gains for N/A, sound and price dont matter.

 

Stillen, I think, but it's really heavy so it kinda negates the power increase. Injen makes good power in the mid to high range but supposedly loses a little TQ down low. Borla and Nismo are about even with a fair amount or power across the powerband and a bump up top.

 

id have to say the injen makes more. this of course is non factual information im blabbing about right now. the way i see it is, there is less bends in the injen and the severity of the bends in the injen are far less when compared with the stillen.

you know i have to retract my first statement. i beleive both are the same, but give the added point to injen for looks and sound!

butt dyno says, "nice lil doggie......nice lil doggie.... o wait yeh FAST!"

rrrrrrrright

john

 

With just the Injen straight tip exhaust I gained almost 1mph and .1-.2 quicker in the 1/4 mile. Going from the Beltimer.

 

Stillen is good, so is Injen. I'd stay away from Borla unless you plan to have it welded.

 

than stock. Can ten pounds really offset the gains?

With those torque and HP numbers, I would think the Stillen exhaust would really offer noticable improvement.

 

ok.........

look at it from this prospective. would you rather have the stillen which is heavier than injen, yet yeilds the same gains(as injen)? of the injen which is lighter and yeilds the same gains(as stillen)? look at the bends in the stillen. one can easily see that the agressive bends in the stillen are a sure sign that the stillen system, when flow tested, will not out flow the injen.

this of course, comes with no supportted facts or test results. i dont know the exact diameter of the injen VS stillen True dual exhaust. assuming both are the same, wouldn't you think the exhuats with the least aggressive bends would yeild a higher HP gain? especially if your going F/I?

not to mention that the injen exhaust is beautiful from behind. trafficers from behind are sure to see a great sight when they pull behind a Z with the Injen SES. i personally have had many WRX and porsche owners express their liking of the injen SES on my car.

john