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Steeda

Axle-Back Exhaust System

$1,209.90 $784.95 Save $424.95

SKU: 555 3612

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Steeda axle-back exhaust system is a performance upgrade for 2018-2023 Mustang Fastback GT models. This system features can-style mufflers with an aggressive, drone-free exhaust note and a compact design that tucks under the rear valence.
Show original supplier description
The Steeda axle-back exhaust system is designed to provide an aggressive modern tone while maximizing the performance of your 2018-2023 Mustang Fastback GT. Featuring can-style mufflers with embossed branding and precision welding, this system tucks neatly under the rear valence for a clean look. The 3.5-inch polished exhaust tips are fully adjustable and rotatable, allowing for perfect alignment and symmetry during installation. Constructed from 304-stainless steel, the system offers high corrosion resistance compared to 409 or aluminized steel alternatives. This durable construction ensures a long service life, while the lightweight design contributes to a 20% reduction in weight compared to stock components. Installation is a straightforward bolt-on process that can be completed using common hand tools. This system is exclusively engineered for 2018-2023 Mustang Fastback GT models. It delivers a meaningful increase in power and sound without introducing unwanted cabin drone during daily driving.

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

Fitment Guaranteed

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

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Specifications

BrandSteeda
Part Number555 3612
CategoryExhaust
5,000+ Trusted brands
1M+ Enthusiasts
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(760) 282-4645 hello@motormia.co

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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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