The selection of aftermarket Mustangs seems endless, but that won't stop Shelby from possibly adding more models to the mix.

A report suggests that the company is planning  to possibly add a twin-turbo package to 2007-2009 GT500 models, and a performance package for the 2010-2011 V-6 and GT models.

Shelby is soliciting feedback from consumers, and there's a chance that the 2011 Shelby GT350 will soon have some company in the lineup.

The company has already built a prototype model called the Shelby GTS that could possibly be previewing the performance package. With an estimated price between $9,000 and $12,000, the GTS has features like a custom hood and fascia, upgraded brakes, a performance exhaust, and all kinds of exterior and interior styling upgrades.

If the twin-turbo version comes to fruition, it would cost about $100,000 and have a 5.4-liter V-8 capable of more than 1,000 horsepower. Like the GTS, the twin-turbo car would have upgraded brakes and an upgraded exhaust, to go along with a performance suspension, exterior and interior upgrades, and a short-throw shifter.

The aftermarket just can't get enough Mustangs.

[Mustang Daily]