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X51 or aftermarket upgrades

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I am in the process of ordering a Targa 4S and was wondering if I should spend the money and get the X51 package or go aftermarket? If aftermarket, what is the best upgrade for ecu, exhaust, headers etc.? Thanks for your help.

If money is not an issue go with the X-51. It is not easily replicated in the aftermarket. The intake starting at the a/f to the engine is different. The heads are different too, but I am not sure exactly how. I believe I read they are ported and polished.

Get the X-51 then change the cats and Muffler and you could probably add another 10-15HP. If I was ordering and money was not the issue it is the way I would go.

Check out the parts catalog to determine the differences for yourself.


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I am in the process of ordering a Targa 4S and was wondering if I should spend the money and get the X51 package or go aftermarket? If aftermarket, what is the best upgrade for ecu, exhaust, headers etc.? Thanks for your help.

You can get most of the X51 parts actually pretty inexpensively from Suncoast Porsche and such. The heads are the most expensive part of the X51 package, but from my understanding its just that the heads come preassembled with a stiffer valve spring to tolerate the extra rpm the X51 will see. I would do a mixture of both, which is what I am going to do...I plan on X51 airbox, intake manifolds, throttle body, the plain jain 3.8S head along with X51 headers, 200cpi cats and a Borla muffler. As far as ECU I am leaning towards Revo as they seem to have more tuning capability than GIAC does. The intake parts I mentioned for the X51 total around $2500.00, plust $600.00 for the X51 headers. The Porsche PSE is a ton of money and alot to install. The price of the PSE will pay for headers/cats and mufflers. You can do this for alot less than the $17k Porshce wants for it, but it won't be factory installed. Porsche dealers also can add the peformance kit but it comes in around $3k more than just ordering it that way from the get go.


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I was thinking if I got ithe X51 from Porsche, I should just get the turbo and be done with it. How much is it going to cost you with some of the X51 and other aftermarket parts?

A lot less than the TT. My total outlay will probably be in the $6-7krange. The exhaust is about $3k the intake parts will run about $3.5k with install.

Remember this is with not changing the heads and don't go with PSE.


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