Driveshaft Shop Rear Axle Direct Bolt-In 800HP Fits 2004-2007 Subaru WRX STi

RA8528X4 Superseded to RA8528X4-V2

Its been a long time coming for this set of axles. When the STi came out, many had surpassed the 600HP mark and we went right from the axle bar upgrades using the factory CV's to the level 4 Axle and Hub kits. Some time has passed and the cars are starting to get older, and most builds are under 800HP so we decided to make a direct bolt in axle that will support 500WHP.

This is similar to our Level 5 axle except the outer CV is made from Billet Chromoly and the internals are also made from the same high grade material, while using the original spline size to fit the stock hubs. To make sure the center bar was up to the task of hard launches, autocross and rally demands, we have decided to use the new 300M material we have been getting directly from the mill in Sweden (*Ovar). This material has proven to be without a doubt the strongest and most resilient bar material we have used to date. Also we have recently changed the inner CV from a tripod design to a full ball and cage design with a larger radius to the spline plug for added strength. So there you have it, a direct fit axle that will with stand the most violent launches, time attack or rally applications (ask about the road rally package that uses a ultra high grade grease and vented boots).

Rear

Warranty: 1 year

2004-2007 For Subaru WRX STi Direct Bolt-In 800HP

For the past 30 years, we’ve designed many of the driveshafts used in numerous record setting racecars. We offer driveshafts in aluminum, steel, chromoly and now carbon fiber so we can design a solution that fits your needs. Each driveshaft we produce is dynamically balanced at over 9000 RPMs to ensure unbeatable reliability. If you need a custom part, give us a call. We specialize in the impossible.