Drivetrain› Differentials and Rear-End Components

Drive Shaft Shop

X4 Rated Front Axle Set

$1,399.96

SKU: RA4001X4/RA4004X4

In Stock
In Stock
Ships by Aug 4
Free Shipping over $100
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Drive Shaft Shop X4 Rated Line represents a significant advancement in performance axle technology, engineered for vehicles that balance street performance with track-day demands like drag racing, road course, and auto-cross. These axles are capable of handling 700-1000WHP, depending on the specific application. They are designed as a direct bolt-in, intended to withstand the rigorous demands of performance driving. Special fitment notes apply: these axles are for EG or EK chassis using EKK2 mounts only. If using EKK1 mounts, a different part number (RA4005X4/RA4006X4) is required. Additionally, a K20 RSX / EP Civic Si Intermediate Shaft must be used for proper installation. This product is for the Right Side Axle only. Note that the product is non-refundable after installation. The Drive Shaft Shop backs this axle with a 1-Year warranty.

MIA's Description

The Drive Shaft Shop X4 Rated Line is a pair of performance axles engineered for fast street cars that also see track use. Designed to handle 700-1000WHP, these axles are constructed with 300M bar and spline materials, along with a chromoly CV housing. They are considered a direct bolt-in design, built to withstand significant abuse.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandDrive Shaft Shop
Part NumberRA4001X4/RA4004X4
CategoryDrivetrain

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy