Driveshaft Shop X4 800HP Rear Axle - Subaru WRX STI (GD) 2004-2007

Driveshaft Shop X4 800HP Rear Axle - Subaru WRX STI (GD) 2004-2007

Driveshaft Shop SKU: DSS510215
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Driveshaft Shop developed the X4 line for fast street cars that still get tracked, and on the GD chassis STI the rear axle is rated to 800 HP. The shaft runs a 300M axle bar and a 300M splined stub inside a chromoly CV housing, a material specification chosen for torsional strength and fatigue life the factory Subaru rear axle cannot match. It is a direct bolt-in that uses the stock rear differential and hub, so nothing on the car has to be cut or machined. The axle is sold individually, so two are needed to replace both sides, and Driveshaft Shop backs it with a one year warranty.

Specifications

Type Direct bolt-in X4 rear CV axle shaft
Position Rear
Material 300M axle bar, 300M splined stub, chromoly CV housing
Horsepower Rating 800 HP
Quantity 1 (single axle, order two for a complete pair)
Warranty 1 year
Part Number 510215 (previously RA8528X4-V2)

This part fits:

Year Make Model Submodel
2004-2007 Subaru Impreza WRX STI

Shipping

  • Orders placed before 3 PM ET typically ship the same business day. Larger items ship within 1 to 3 business days.
  • Standard, expedited, and overnight options at checkout.
  • Oversized items ship by freight and take longer.
  • Special order items follow a lead time we confirm with you individually before the order is committed.
  • Backordered items ship as soon as stock lands. Lead times are manufacturer estimates and can change. Contact us for current ETAs.
  • Need to cancel? Email us right away. Cancellations are not guaranteed once an order is in process. In-stock orders cancel free before they ship; a 6% fee applies only to confirmed backorders and special orders.
  • International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

  • 30 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
  • Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
  • Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
  • Final sale: special orders, coilovers, electronics, engine internals, turbochargers, superchargers and turbo kits, unless defective or we sent the wrong item.
  • Product images may be representative. The SKU and specifications in the listing are what ships.
  • Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Returns & Refunds · Warranty
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