The Ford Mustang Shelby GT350 is already one of the best track-ready sportscars for sale in America, and for 2019, it gets even better. Ford Performance focused all of its efforts on the standard GT350 — the GT350R carries over unchanged. The 2019 model gets updated aero, suspension and a bespoke set of Michelin summer tires.The new rear wing has an optional Gurney flap, helping downforce without adding too much drag. The other aero update is out front. The standard model now gets the grille from the GT350R. It has fewer openings, creating less front-end drag. The wing, grille and new wheels are the only visual tells that separate the current car from the 2019 model. Ford says that customers were happy with the current model's appearance.In order to improve corner grip and braking, Ford commissioned a custom set of Michelin Pilot Sport Cup 2 tires that have a model-specific tread pattern and compound. They're 295/35-19 section up front and 305/35-19 section in the rear, the same as the current car. The springs and shocks have been revised — 10 percent softer in the rear and 10 percent firmer in the front. The tuning for the Magneride system, ABS and electronic power steering system have also been revised.Ford also gave the GT350 some attention on the comfort front. Power adjustable seats with faux suede inserts are available, along with faux suede inserts on the doors. An optional 12-speaker B&O Play sound system is also available. But even without springing for the added niceties, all GT350s now come standard with the 8-inch SYNC 3 touchscreen infotainment and dual-zone climate control. Also of note are two newly available colors, Velocity Blue and Ford Performance Blue. Unfortunately, Ford's trick digital instrument cluster will not be available.The updated 2019 Ford Mustang Shelby GT350 goes on sale in early 2019. Pricing has yet to be announced for the new model and its optional features.