Headers...

Hi can anyone tell me if you can put 997S Headers onto 996 3.6l? Also whats the MM diffrence? and what Gains am i looking at? Thanks guys

I don't have your answer but would also be nice to see if the 997's airbox would fit the 996s.

Don't want to hijack the thread here, but what is the difference between the 997 and 996 airbox that makes it better?

No gains on 996 from any headers. Been there, done that.

Even if your Chipped? and have Pipes and Mufflers?

It is all about air flow...stock headers are nice and short. You may port & polish the stock headers, but will not get much, if anything, from aftermarket headers

Wouldent 997S Headers be the same Length? they are bigger from Inside i think 10-12mm Wouldent that be more Air-Flow, hence more power?

I've read two comments that headers are somewhat a waste of money. Will flashing ecu add hp & torque or just move them around in power band?

Headers work depending on brand, ecu works depending on brand, intake works etc, exhaust works etc. Most of the guys giving advice have never tried. My car is noticeably faster after the modifications than prior. It is faster against other cars as well. I'd like to learn more about the cams, which I'm sure work when right. or the throttle body, or the pressure regulator???

I thought the same thing when I bolted all that crap on my '99. It sounded way better and in some places the throttle response was a little sharper...but it's all psychological, it's a tuner mind **** (and money grab). There's not all this hidden power in your motor that Porsche forgot about. The ECU will make the biggest difference and any gains there come at the expense of drivability, reliability & longevity. There's no free lunch. Even doing before & after pulls on the same dyno can easily be manipulated to show phantom results. If that's your thing, buy a turbo where you can make some real hp gains with mods.

Well said even though not PC

Go check out fabspeed website. The 997S headers were worst looking in design for flow then the stock 996. However speaking to many tuners they have said there is not much to be gained from headers. FWIW I did have the schnell headers on my car and notice very little performance gains. Mostly the engine gained some at the top end. I am willing to sell them as I took them out as I did not like then extra sound. PM if you interested.

You will most likely LOOSE HP from doing this. The regular 355hp 997S comes with horrible headers from the factory that uses a narrow merge collector that is far more restrictive that standard 3.6L (aka 996 X51) headers. Check out the video on Fabspeed's website for more info on this. In fact, the 3.8l X51 option comes with improved headers that are almost identical to the 3.6l headers, except slightly larger in diameter. The 3.8l X51 has different heads that have unique bolt patterns for the intake and exhaust manifolds that are not compatible with other models. There is little to be gained from headers on a 3.6l, but it is a different story on a 3.4l. The earlier cars had more restrictive headers. You will notice that whenever a manufacturer shows a dyno sheet for gain with headers it is always on a 3.4l and not a 3.6l for this reason.