Member Brace Set, Steel Underbody Reinforcement Kit

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AUTOEXE

Member Brace Set, Steel Underbody Reinforcement Kit

Name: Member Brace Set, Steel Underbody Reinforcement Kit
Brand: AUTOEXE
SKU: MFD471

$629.99

SKU: MFD471

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

The AutoExe Member Brace Set is a 4-piece underbody reinforcement kit for the Mazda RX-7 FD3S. Constructed from steel, this red brace set weighs 6.7kg and is designed to suppress body twist and distortion. It helps maintain suspension geometry across the entire underbody.

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The AutoExe Member Brace Set (MFD471) is a performance enhancement for the Mazda RX-7 FD3S. This 4-piece, longitudinal brace set is crafted from strong steel pipe and finished in red. The set includes one front brace and three rear braces, with a total weight of 6.7 kg. Installation involves a bolt-on design but requires removal of the genuine transmission cover. Some sources indicate fitment for RX-7 FD3S models from 1999-2002 or FD3S-200001~, while other sources suggest compatibility with 93-95 RX-7 [FD3S] models. It is important to verify specific chassis codes for correct fitment.

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	AUTOEXE
Part Number	MFD471
Category	Chassis Components

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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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