Cusco Toyota 86 / Subaru BRZ 6spd MT 4.556 Final Gear

If you're looking to get more aggressive acceleration out of your 2013-2017 Subaru BRZ, Scion FR-S, or 2017 Toyota 86, changing the final drive ratio is a well-known way to achieve it. This Cusco 4.556 final gear set is designed to shorten your gear ratios, meaning your engine will reach higher RPMs in each gear, translating to quicker acceleration from a standstill and through the mid-range. This is a popular modification for drivers who want a more responsive feel, especially if they've added other performance parts or plan to use the car for track days or autocross.

Cusco is known for making solid drivetrain components, and this gear set is no exception. They are precision-machined to meet strict tolerances, ensuring smooth operation and durability. A 4.556 final drive ratio is a significant change from the stock gearing, offering a noticeable boost in acceleration. Keep in mind that changing the final drive ratio will also affect your highway cruising RPMs; expect them to be higher than stock, which can impact fuel economy. This is a direct replacement for your factory ring and pinion gears, but it does require professional installation due to the specialized tools and setup knowledge needed for setting gear mesh and backlash.

When installing a new final drive gear set, it's crucial to follow the manufacturer's break-in procedure carefully. This typically involves a period of gentle driving without hard acceleration or heavy loads, allowing the new gears to properly seat and mate. This helps ensure longevity and optimal performance. If you're building a performance-oriented vehicle and want to maximize your car's acceleration potential, this Cusco final gear set is a strong option to consider.