Drivetrain› Differentials and Rear-End Components

BMW

Performance Differential

$186.85

SKU: E30CUSTOMDIFF

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The BMW E30CUSTOMDIFF is a custom performance differential designed to increase torque and traction. This upgrade offers better handling and acceleration, potentially reducing lap times.
Show original supplier description
The BMW E30CUSTOMDIFF is a custom performance differential engineered to enhance your vehicle's drivetrain capabilities. By increasing the torque and traction delivered to the ground, this differential upgrade facilitates faster acceleration and improved handling, which can contribute to reduced lap times on the track. This component is ideal for performance driving enthusiasts seeking to extract more capability from their BMW. While specific technical specifications beyond its performance-enhancing function are not detailed in the provided evidence, the product is presented as a direct upgrade for improving drivetrain efficiency and driver engagement.

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

BrandBMW
Part NumberE30CUSTOMDIFF
CategoryDrivetrain

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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.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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