Never heard of a Porsche X50? Most people haven’t. But don’t be confused; it’s a factory option package, not a stand-alone Porsche model.
Here’s what Motortrend wrote about the X50 Power Kit in 2003:
“The X50 package must be specified at build time and cannot be retrofitted. The substance of it resides beneath the  Turbo's rear wing in the form of modified turbochargers (more boost), larger intercoolers, and more aggressive engine-control programming. It takes the standard Turbo's 420-horse rating up to 450 and creates a choice in between the Turbo (base MSRP of $116,200) and the 462-horsepower, rear-drive-only GT2 ($181,700). The upgrade costs an additional $17,880.”
The 2019 Porsche 911 Targa 4S above, available for sale at Isringhausen Porsche, is equipped with an X50 Power Kit. It offers superior performance with a retractable Targa top, plus the peace of mind of a certified pre-owned warranty.
Test drive it today at Isringhausen.