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  • QUALITY CRAFTSMANSHIP
  • 30 Day Return Policy
  • E-mail & DM Support

Built in Houston, TX

Designed and manufactured in our Houston, TX facility

USA-Made
Family-Built
Quality Guaranteed

2015-23 S550 Mustang EMP Aluminum Rear Firewall

$399.95
10 Left In Stock

A Critical Upgrade for Serious Racers

  • NHRA & Formula Drift Compliant – Made in the USA and engineered to help your S550 Mustang meet current motorsports safety regulations and technical inspection requirements
  • Precision 3D-Scanned Fitment – Digitally developed from the factory trunk architecture for exceptional fit, coverage, and installation accuracy
  • Full Rear Vertical Bulkhead Coverage – Extends across the entire area behind the rear seats, eliminating gaps that can compromise safety compliance
  • Race-Proven by Professional Teams – Trusted by competitors including 777 Drift Team for demanding motorsports applications
  • Lightweight Aluminum Construction – Delivers the strength and durability required for competition while maintaining a race-focused design
  • NHRA & Formula Drift Compliant – Made in the USA and engineered to help your S550 Mustang meet current motorsports safety regulations and technical inspection requirements
  • Precision 3D-Scanned Fitment – Digitally developed from the factory trunk architecture for exceptional fit, coverage, and installation accuracy
  • Full Rear Vertical Bulkhead Coverage – Extends across the entire area behind the rear seats, eliminating gaps that can compromise safety compliance
  • Race-Proven by Professional Teams – Trusted by competitors including 777 Drift Team for demanding motorsports applications
  • Lightweight Aluminum Construction – Delivers the strength and durability required for competition while maintaining a race-focused design
DESCRIPTION
 

Made in the USA and engineered for competitive motorsports, this aluminum rear firewall addresses a critical safety requirement for S550 Mustangs equipped with trunk-mounted fuel cells. Developed through precision 3D scanning of the factory trunk architecture, it delivers comprehensive coverage across the entire vertical bulkhead area behind the rear seats - eliminating gaps that compromise safety compliance.

Purpose-built to meet Formula Drift and NHRA technical regulations, this firewall is trusted by professional teams including 777 Drift Team for both structural integrity and rule adherence. Installation and finishing per your sanctioning body's specifications (including seam sealant) ensures your platform meets current safety standards for competition.

Mounted to chassis with six M6 stainless steel bolts - holes must be drilled using 1/4" drill bit.

Disclaimer: Evans Motorsport Performance warrants initial material and manufacturing quality. Performance and compliance outcomes depend on proper installation, finishing, and adherence to your motorsport's technical rulebook.

Application: Custom designed for 2015-2023 Ford Mustang GT, V6, EcoBoost, Shelby GT350, Shelby GT350R and Shelby GT500 Fastbacks (coupes). Does not fit convertibles.

FEATURES
 

• Made in the USA by EMP

• CNC machined from solid 1/8" premium American made 5052 aluminum stock

• Premium stainless steel assembly and installation hardware

• Coverage of all holes in the vertical bulkhead area behind the rear seats plus the spare tire well and indentions in chassis floor

• Custom Made for 2015-2023 S550 Mustang GT, EcoBoost and V6 Fastbacks (Coupes - will not fit convertibles)

SHIPPING INFORMATION
 

FREE SHIPPING on standard orders over $49 within the continental United States. We utilize USPS, UPS, and DHL for
shipping services. For shipping addresses within 48 contiguous United States, next-day shipping on most parts if you place your order by 5 PM CST. UPS does
not deliver to P.O. boxes, so we recommend a physical address. Non-returnable custom orders may take up to 10 days to ship.

Most parts ship the next business day unless they are out of stock or are custom orders. In the continental U.S., standard
ground delivery takes approximately 3-5 business days. We offer 3-day, 2-day, or 1-day shipping options for faster delivery, shipped the next business day if ordered by 5 PM CST. Custom orders can take up to 10 days or more to ship. For APO/FPO addresses, shipping can take up to 2 months via USPS.

“Thank you so much for your great customer service! Your products are of great quality and I get so many compliments!”

William Windsor

EMP – QUALITY AMERICAN MUSCLE CAR MODS

Quality isn't just our reputation; it's our promise.

Evans Motorsport Performance is the creation of father-son duo Travis and Cole Evans. Your vehicle deserves nothing short of excellence, and that's precisely what we provide. Every EMP component is built at our Houston, Texas, facility.

Our commitment? To provide you with top-tier, USA-made car modifications you can install with absolute pride and trust.

MAKE YOUR MUSTANG SAFER

With an EMP Mustang Firewall

Competition-Ready Safety

Designed specifically for serious S550 Mustang race builds, this aluminum rear firewall provides the coverage and protection required by many motorsports sanctioning bodies. Whether you're competing in drifting, drag racing, or other forms of competition, it's built to help you meet safety requirements with confidence.

Precision Engineered for the S550 Platform

Using advanced 3D scanning technology, this firewall was developed directly from the factory trunk structure to ensure exceptional fitment and maximum coverage. The result is a clean, professional installation that integrates seamlessly into your race car build.

Trusted by Racers, Proven on Track

From grassroots competitors to professional teams like 777 Drift Team, this rear firewall delivers the durability, fit, and compliance-focused design demanded by today's motorsports environment. Built from lightweight aluminum, it's a race-ready solution engineered for performance and peace of mind.

WHAT’S IN THE BOX

We aim to make installing your new parts as quick and easy as possible. As well as your mod parts, we give you all the info you need for an efficient installation. Here’s what you get:

  • Passenger and Driver Side Panels
  • Center Strap for Connection of Panels
  • Bottom Strap for Extra Floor Coverage
  • Assembly and Mounting Hardware

OUR CUSTOMERS LOVE THEIR EMP MODS

Emailed and explained what I needed and they knew right away what part I needed and sent it in.

Lorenzo M.
Verified buyer

Aggressive look. This rear diffuser will give such an aggressive and unique look to your Mustang. I love it.

Eva U.
Verified buyer

I’ve purchased 5 different rocker splitters. This is the best one, by far. Functional & made of metal. Quality product & durable.

JONATHAN K.
Verified buyer

All the parts I’ve ordered from EMP are 11/10 quality not to mention the customer service is impeccable. The diffuser is perfect fits the car great...12/10 experience

Kenneth N.
Verified buyer

HOW TO INSTALL YOUR EMP S550 FORD Mustang REAR FIREWALL

FREQUENTLY ASKED QUESTIONS

What is Evans Motorsport Performance?
 

Evans Motorsport Performance, is founded, owned, and operated by father and son Travis and Cole Evans. We're dedicated to crafting car mods that outclass and outlast, all with a seamless installation. Quality isn't just our reputation; it's our promise. Your ride deserves excellence, and we deliver.

Where do you make your mods?
 

We build each EMP part at our Houston, Texas hub - no distant factories in faraway lands here. Our mission? Delivering peak-quality, American-made car mods you can install with pride and confidence. 

How do I get my mods?
 

Revamping your muscle car is easy with us. Select your vehicle, and pick the custom mods you want. We can source them from over 1,500 quality suppliers if you need help finding them. Finally, sit back and let us speed-ship your order, free for $49+ buys.

My part doesn’t fit. Can I get all my money back?
 

We’ll refund your money, less any merchant or restocking fees we incurred which we’re unfortunately unable to refund.

What's your shipping policy?
 

We offer FREE SHIPPING on standard orders over $49 within the continental United States. We utilize USPS, UPS, and DHL for shipping services. For shipping addresses within 48 contiguous United States, we offer Next-day shipping on most parts if you place your order by 5 PM CST. UPS does not deliver to P.O. boxes, so we recommend a physical address. Custom orders, which are non-returnable, may take up to 10 days to ship.

How long until I get my mods?
 

Most parts ship the next business day, unless they're out of stock or are custom orders. If you're in the continental U.S., standard ground delivery takes approximately 3-5 business days. We offer 3-day, 2-day, or 1-day shipping options for faster delivery, which are shipped out the next business day if ordered by 5 PM CST. Custom orders can take up to 10 days or more to ship. For APO/FPO addresses, shipping can take up to 2 months via USPS.

2015-23 S550 Mustang EMP Aluminum Rear Firewall

$399.95
10 Left In Stock

A Critical Upgrade for Serious Racers

  • NHRA & Formula Drift Compliant – Made in the USA and engineered to help your S550 Mustang meet current motorsports safety regulations and technical inspection requirements
  • Precision 3D-Scanned Fitment – Digitally developed from the factory trunk architecture for exceptional fit, coverage, and installation accuracy
  • Full Rear Vertical Bulkhead Coverage – Extends across the entire area behind the rear seats, eliminating gaps that can compromise safety compliance
  • Race-Proven by Professional Teams – Trusted by competitors including 777 Drift Team for demanding motorsports applications
  • Lightweight Aluminum Construction – Delivers the strength and durability required for competition while maintaining a race-focused design

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Free Shipping
QUALITY CRAFTSMANSHIP
30 Day Return Policy
E-mail & DM Support
  • Free Shipping
  • QUALITY CRAFTSMANSHIP
  • 30 Day Return Policy
  • E-mail & DM Support