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Drivetrain› Drive Shafts and Components

The Driveshaft

30 Spline Axle

Name: 30 Spline Axle
Brand: The Driveshaft
SKU: RA8506X5

$1,096.48

SKU: RA8506X5

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Non-Returnable Item

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Overview

The Driveshaft RA8506X5 is a direct-fit axle designed for the 2015-20 Mustang. It features splines made from Ovaco 300M material, 4340 billet CV mounts, and 108mm CVs with 300m billet chromoly cages and races. The axle is equipped with larger 30 spline bars for a 1400HP rating.

Show original supplier description

The Driveshaft RA8506X5 is a high-performance direct-fit axle engineered for 2015-20 Ford Mustangs. This axle leverages Ovaco 300M material for all its splines, a highly regarded steel used in numerous world-record-breaking IRS/CV driven vehicles. It incorporates 4340 billet CV mounts and a proven 108mm CV design, featuring 300m billet chromoly cages and races. Specifically for the 1400HP rated axles, larger 30 spline bars are utilized for enhanced strength. The construction emphasizes durability and strength through processes like CNC spline rolling, which forges and compresses the metal's microstructure for superior resilience compared to cut splines. The axle is also finished with Neo HPCC1 grease and a higher durometer Neoprene boot for robust performance under demanding conditions. Additionally, end caps are integrated onto the CV housings for easier disassembly, featuring blue RTV sealant for a reliable seal. This ensures the axle can handle significant power output, making it a top-tier upgrade for the S550 Mustang platform.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

Brand	The Driveshaft
Part Number	RA8506X5
Category	Drivetrain

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Returns & Fitment

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.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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