USA Standard Gear Ring and Pinion Gear Kit; 5.13 Gear Ratio (05-09 Mustang GT)Find parts that fit my vehicle

Designed for Street & Track. One of the most obvious ways to boost the performance of your 2005-2009 Mustang GT is by upgrading the gear ratio to improve low end torque and increase acceleration rate. The USA Standard Ring Gear and Pinion Kit - 5.13 Gears achieves both objectives while still leaving you money in the kitty to buy a celebratory pizza.

5.13 Gear Ratio. The highest factory gear ratio available for the 2005-2009 Mustang GT is 3.55:1. The USA Standard Ring Gear and Pinion Kit comes in a 5.13 ratio, delivering faster times off the mark. True, you won't get any happy endings at the fuel pump but, when you're racing, you don't expect savings here, do you?

Long-lasting Construction. The USA Standard Ring and Pinion Kit is manufactured from AISI 8620 carburizing alloy steel. You benefit from an automotive part with improved case/core properties. Precision machined to accommodate anything from the most common to the rarest differential applications.

Installation. Full instructions are provided for those who have a high level of mechanical expertise and want to perform the installation themselves. Otherwise, experts recommend having the ring gear and pinion kit installed by a professional.

Warranty. The USA Standard Ring Gear and Pinion Kit - 5.13 Gears is covered by a one-year warranty against defects in materials and workmanship. Regular exclusions apply.

Application. The USA Standard Ring Gear and Pinion Kit - 5.13 Gears fits all models of 2005-2009 Mustang GT.

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