how rare is this mod and can anyone chime in and compare with the S or base engine ...noticably faster? engine sound? i have seen sometimes just the x51 oil pan, exhaust, or other pieces and not the whole package? are there any markings, buttons, distinguishing things... , thanks,

 

The obvious one is the carbon fiber dual inlet airbox under the hood. The X51 package IIRC was the airbox, oil pan, headers, PSE, headwork, and the tune. Other's may chime in if there was maybe a different cam but I'm not sure. It took the S from 355 to 381bhp. A nice bump on an N/A car.

 

I just traded an 09 C2S cabrio PDK for 10 C2S Coupe 6 speed with X51 powerkit.

Aside ftom the transmission the car just came alive. It's now 408HP.

There is a sport button that also turns on the stiffer suspension and sport exhaust. Any of which can then be turned off independently of eachother. In the engine compartment you get a carbon fiber intake with wording PORSCHE EXCLUSIVE POWERKIT.

Sport exhaust is pretty cool. The start up default is in sport exhaust mode so the car sounds great when starting up.

 

well, i'm a-lookin... there don't seem to be too many out there, and i have seen cars with the dual intake box, or the headers or the oil pan(what would be the advantage of that?),,,anyway, the whole package sounds like something special, cheeers

 

I got the X51 on mine. There's no oil pan on the 997.1 series in the kit; the X51 oil pan people refer to in this forum is a 996 X51 oil pan. The kit involves a bigger throttle body, aluminum intake, carbon fiber airbox, exhaust manifolds, revised cylinder heads, ECU programming, center radiator, a couple of different underbody panels and, if your car doesn't have it already, PSE. Different cams are for the 996 version as there are no camshafts in the 997 version. I have the complete parts list and procedures for the installation at home, given to me by my dealer.

Also, your engine's serial number gets an "S" stamped at the end of it on the engine's case and your ECU's number also changes at the end and can be seen with Durametric or PIWIS tester; that is more definite proof that one has the full kit on the car and not the "X51 Light" that other owners have done, which by itself is not a bad thing but it's not the same as the bona fide kit.

 

I checked my window sticker. The powerkit adds $16,900. Thats why we dont see too many of these. The guy who specked out mu car also added the $9000 PCCB's and a bunch od options for a $139,000. sticker on a 10 Carrera S............Love it.

 

got x51 in my club coupe, had an ex-997S for 1 year before it.

very slight straight line performance advantage on a straight line from 2-3-4 upshifts. Useful on the track if there is a long straight; otherwise, no significant performance advantage for daily use.

sport exhaust makes it sound better.

I will not pay more than $5000 for this x51 package, but it comes standard on a club coupe.

 

Why sounds so negative. It is the same engine they use on the 997 GTS and every one rave about it. I retrofit mine cause Im not a fan of widebody 911. I think the 997 is a bit bloated already!
I also replace the primary muffler with 2 straight pipes from Tubistyle and added BMC filter. The car sounds like a proper sportscar with the PSE button on. After 3000miles of ownership, the following is my thoughts
Pro: Nice to know I got more bhp than the new 991 which will cost me
more £
Peak torque appears lower down than 991 which makes the car feel
very responsive during daily driving
Bragging right-slightly faster than the GTS beyond 100mph and higher
topspeed than 991
Only 3 manual cars in UK fitted with the X51 kit for the C2S coupe
Still got the rear seats which I can take the kids out. More comfortable than the GT3 (For two seater experience, I can still take the F355 out)
Cons: Crazy pricing
Depreciation

 

Thanks for the info, been searching the board for an itemization of the X51 - looking at aftermarket alternatives.

 

In my opinion save your money , I have a non S 997 with a tune and cold air and stock S's can't keep up with me.

 

You know, I hear what you are saying; but in light of other cars' prices that are significantly higher and either don't out-perform, or even equal your car's overall performance capability; I like to think that even at that price, it's a steal. Extra HP just isn't cheap out of one of these cars, as you know. It's a shame more C2S & C4S cars didn't get those two options (at least the PCCB's). Far less of these cars to be found with either of these options, let alone both. You got a winner!

 

Thanmks 1blinkgone. I really love the car.
LarryP...As for a tune providing more power, thats always possable. But parked side by side I"ll take the Powerkit and PCCB's anyday.

 

The revised cylinder heads item worries me. Anyone ever added X51 afterwards? Probably wouldn't want anyone fiddle with the engine other than factory installment. Would be curious to hear how safe aftermarket installment is...

 

^ I had mine done about 3000 miles into my ownership (bought it brand new and got the kit on the Tequipment catalog) by my local Porsche dealer. No warranty problems and now have added an extra 40k trouble free miles; I did this in 2006. No problem getting this work done at an authorized dealer (my warranty stayed in place) and was done by a tech who had done a few on 996s, though my 997 was his first of this series.

 

Maybe you're too modest to say it but Stock S's not keeping up with you suggests that you're a good, perhaps even really good, driver! I wish I could make the same claim! (This coming from someone who, early on in my track and learning days, was passed by an exceptional driver in a Dodge Neon while I was driving an "S" - and later he taught me about 50 things in 15 minutes.)