iliasgk74

Hi ,
as this is my first post in forum i am very happy to be member in rennlist and learn from your posts about porsche cars!
I am new owner of 997 4s mod 06 with PCCM,PSE,SportChrono and more...
Also i want already to improve my car and i am thinking of changing headers and induction kit with x51 ones.
I have found part number of headers and i need part number of air induction kit part number(carbon air intake kit)

thanks in advance!

OldGuy

From what I remember this X51 kit is worth 12hp? I dont think its worth it for the price.
your butt dyno wont feel it.
individual improvements(like I think you suggested) or going to Sharkwerks.com or GMGRacing.com are your best bets.

KeninBlaine

From what I've read on these forums, headers and intakes make no measurable increase in power. However, I installed used X51 headers when I put on a used PSE muffler system because it wasn't an expensive upgrade. The only mod that appears to actually increase performance is high flow cats (200 cell). The X51 intake looks pretty, but won't increase power, and requires that an additional intake hole be cut into your rear deck lid.

iliasgk74

my complete thoughts are x51 headers and intake kit,awe 200 cell cats,oem muffler PSE,and ecu update from APR.
And i am some miles away....in Greece!

OldGuy

Hey thats where they make Doughnuts!! Call Alex at Sharkwerks.com or Faybrce at GMGracing.com

Both have done extensive study on the 997.2 and I am sure FedEx or UPS will deliver to Greece. I know when I watches the Olympics in Athens for 846 straight hours they both advertised.

How about GredEx?

Carrera GT

That shopping list, plus labor, would probably bridge the gap to update to a 997.2 S -- the X51 doesn't come close to the DFI engine, let alone stirring PDK into the mix.

Edgy01

For the nicest sound ever, the X51 headers and intake are outstanding!

Who cares whether it gives you another 5-10 hp? Proper octane will restore more output than that stuff will. I did the X51 headers and love them. (I also cleaned them up,--ports polished).

Dave07997S

Not correct, the X51 is worth 26hp and this is through the restrictive OEM cats. I do agree the price is prohibitive. You can do what I call the X51 lite, do all the parts of the X51 minus the heads. All Porsche does with the X51 heads is a cleanup of the bowl area and a stiffer exhaust valve spring to let the car rev an additional 150rpm. You can do the X51 intake, intake manifolds and headers along with some high flow cats and you will be in the 380-390hp range. With a total of around $5k spent on parts. The stock heads flow very good, as they must if the car is able to make 93hp/litre while only revving to 7300rpm. The bowl cleanup is at best worth only 5rwhp. Porsche charges an arm and a leg for these heads as there is no core charge required.

Most of the power of the X51 kit is coming from the intake and intake manifolds along with the larger throttle body and headers. Whats funny is the 3.6L 997 has headers that are very similar to the X51 parts other than smaller port openings. The stock 997S headers are junk.

Dave

iliasgk74

what do you mean heads?

agdamis

From one Greek to another.

Don't waste your money my friend. Porsche engineers have already done their work. The big difference is in the Heads (Kefales tou kinhtipa......Greek translation), which realistically you are not going to bother with as it will be very very expensive and there are very very few mechanics in Greece that will be able to do that correctly. I do not know where you leave in Greece, I used to live in Athens and the car is already way too fast for Greek Roads as it is. I usually drive a friend's 996 C2 or a Boxster S every year when I am there and they are a handful. Even if you want to embarace the "fast and furious" crowd of Athens you will not have an issue with the car as it is. Throw the headers on for some sound but the rest will not really give you horsepower.

In my opinion learn to slide it around the very slick Greek roads and learn proper car control and if you want to have real fun find a proper LSD (Limited Slip Diff) for it. Also go to a couple of the local race tracks Megara for example and learn how to really push the car and learn how 911's really are to drive in a control environment. Short of a couple of top speed runs up in Egnatia Odo, a Road in Northern Greece, it is more about finesse rather than raw power.

Kane ths bantes sou re megale kai matheto to gkazi, kai ase ths malakies tha to xalaseis to autokinhto. Ama den to peirazeis to Porsche tha zeisei gia panta einai skulia. To 997s einai to trito mou 911 me pistes kathe xrono kai den pathenoun tippota.

Elpizw n'akouseis ton gero exw perash k'egw ths kavles autes.

Sorry for the Greek everyone.

Enjoy the car.

Dave07997S

The heads are where the cams sit atop along with the intake and exhaust valves. It is really the only "hard" part that is with the X51 kit. Everything else is pretty much a straight forward bolt on.

Dave

iliasgk74

thanks for the advises!


pm to agdamis!