LVA 2015-2017 Ford Mustang Premium Bumper - Rear Diffuser Fins
LVA 2015-2017 Ford Mustang Premium Bumper - Rear Diffuser Fins
LiquiVinyl Aerodynamics
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Let’s finish that car.
PRODUCT DETAILS
Transform the rear end of your S550 Mustang with LVA's 4-Piece Rear Diffuser Fins. Designed specifically for the "Premium" two-piece rear diffuser, these fins add aggressive aerodynamic styling while maintaining the factory flow of your Mustang's rear fascia. Each fin is precision CNC-machined in-house at LVA's Indiana facility using LVA's patented Hybrid Aluminum material.
Key Features & Benefits
-
Material: Patented Hybrid Aluminum - Lightweight yet incredibly rigid for street/track performance
-
Manufacturing: USA-Made - Precisely CNC machined in-house at LVA's Indiana facility with reliable quality control
-
Design: 4-Piece Set - Engineered to integrate seamlessly with the factory Premium bumper's two-piece diffuser
-
Finish: Rich black finish that complements any build
-
Edge Trim: LVA Edge Trim included in your choice of 7 colors
-
Installation: Complete hardware kit included with powdercoated L-brackets for secure mounting
-
Bundle Option: Add LVA's Rear Spats to your order and save $25 off retail pricing!
What's in the Box?
-
Qty: 4: Black Hybrid Aluminum Rear Diffuser Fins
-
Qty: 1: LVA Edge Trim (available in 7 colors)
-
Qty: 16: Gloss Black Powdercoated Aluminum L-Brackets
-
Qty: 24: M6 316SS Bolts
-
Qty: 24: M6 316SS Flange Nuts
-
Qty: 2: LVA 1.5in 3M/Avery Vinyl Decals (available in 8 colors)
Bundle & Save!
Add a set of LVA's Rear Spats to this purchase and save $25 off retail pricing!
Fitment Guide
Compatible Models
- V6 Premium
- EcoBoost Premium
- GT Premium
- GT California Special
- GT Performance Package
- 2015-2017 Ford Mustang S550 - Base Bumper
While these fins were specifically designed for the Premium two-piece diffuser, numerous customers have successfully installed them on the Base one-piece bumper as well.
Installation
Professional installation is recommended to ensure optimal fitment and finish. The diffuser fins mount using the included powdercoated L-brackets and stainless steel hardware for a secure installation.
Production & Lead Times
LVA products are made to order. Check LVA’s current production lead times before ordering. Contact 4th to 5th Automotive for order support.
Frequently Asked Questions
What's the difference between the Base and Premium rear bumper?
The Premium bumper is a 2-piece unit with body color painted portions and some textured black plastic. The Base bumper is a single-piece unit. These Diffuser Fins were designed specifically for the Premium bumper, though many customers have successfully installed them on the Base bumper as well.
Will these interfere with my exhaust tips?
No, these diffuser fins are designed to mount between and around your factory exhaust tip locations. They will not interfere with stock or most aftermarket exhaust setups.
Can I install these myself or do I need a professional?
While professional installation is always recommended for optimal results, these diffuser fins can be installed at home with basic hand tools. The included L-brackets and hardware make for a straightforward bolt-on installation process.
4th to 5th Automotive support: Need help with fitment or your order? Contact Caleb directly.
WHY WE CARRY THIS
We only list parts we’d run ourselves or recommend to a friend building a real car. If it feels vague, unverified, or inconsistent, it doesn’t make the cut.
- Fitment-first mindset — no “universal” roulette
- Brand reputation matters — we favor proven manufacturing
- Support that actually responds with real answers
WHAT TO EXPECT
This is the clean path: correct fitment, clean install, and results that match the intent.
- Install-ready experience with correct mounting where provided
- Finish that holds up to real driving, not just photos
- Selections on this page drive the exact fitment shipped
TRUST, BUILT INTO THE PROCESS.
Anyone can list parts. We curate what belongs on a serious build. Our goal is simple: fewer surprises, cleaner installs, and confidence when you hit “Buy.”
Fitment checked
We prioritize vehicle-specific listings and clear selection logic so you’re not gambling on compatibility.
Brand discipline
Proven manufacturing and consistent quality matter more than hype. We bias toward what actually holds up.
Real support
If you have a question, you’ll get a human answer that helps you finish the build — not a copy-paste shrug.
Transform the rear end of your S550 Mustang with LVA's 4-Piece Rear Diffuser Fins. Designed specifically for the "Premium" two-piece rear diffuser, these fins add aggressive aerodynamic styling while maintaining the factory flow of your Mustang's rear fascia. Each fin is precision CNC-machined in-house at LVA's Indiana facility using LVA's patented Hybrid Aluminum material.
Key Features & Benefits
-
Material: Patented Hybrid Aluminum - Lightweight yet incredibly rigid for street/track performance
-
Manufacturing: USA-Made - Precisely CNC machined in-house at LVA's Indiana facility with reliable quality control
-
Design: 4-Piece Set - Engineered to integrate seamlessly with the factory Premium bumper's two-piece diffuser
-
Finish: Rich black finish that complements any build
-
Edge Trim: LVA Edge Trim included in your choice of 7 colors
-
Installation: Complete hardware kit included with powdercoated L-brackets for secure mounting
-
Bundle Option: Add LVA's Rear Spats to your order and save $25 off retail pricing!
What's in the Box?
-
Qty: 4: Black Hybrid Aluminum Rear Diffuser Fins
-
Qty: 1: LVA Edge Trim (available in 7 colors)
-
Qty: 16: Gloss Black Powdercoated Aluminum L-Brackets
-
Qty: 24: M6 316SS Bolts
-
Qty: 24: M6 316SS Flange Nuts
-
Qty: 2: LVA 1.5in 3M/Avery Vinyl Decals (available in 8 colors)
Bundle & Save!
Add a set of LVA's Rear Spats to this purchase and save $25 off retail pricing!
Fitment Guide
Compatible Models
- V6 Premium
- EcoBoost Premium
- GT Premium
- GT California Special
- GT Performance Package
- 2015-2017 Ford Mustang S550 - Base Bumper
While these fins were specifically designed for the Premium two-piece diffuser, numerous customers have successfully installed them on the Base one-piece bumper as well.
Installation
Professional installation is recommended to ensure optimal fitment and finish. The diffuser fins mount using the included powdercoated L-brackets and stainless steel hardware for a secure installation.
Production & Lead Times
LVA products are made to order. Check LVA’s current production lead times before ordering. Contact 4th to 5th Automotive for order support.
Frequently Asked Questions
What's the difference between the Base and Premium rear bumper?
The Premium bumper is a 2-piece unit with body color painted portions and some textured black plastic. The Base bumper is a single-piece unit. These Diffuser Fins were designed specifically for the Premium bumper, though many customers have successfully installed them on the Base bumper as well.
Will these interfere with my exhaust tips?
No, these diffuser fins are designed to mount between and around your factory exhaust tip locations. They will not interfere with stock or most aftermarket exhaust setups.
Can I install these myself or do I need a professional?
While professional installation is always recommended for optimal results, these diffuser fins can be installed at home with basic hand tools. The included L-brackets and hardware make for a straightforward bolt-on installation process.
4th to 5th Automotive support: Need help with fitment or your order? Contact Caleb directly.
Innovative Aero. Track-Proven.
LVA is a leading manufacturer of innovative aerodynamic solutions — track-proven through real testing. Designed to perform, engineered to fit, and built to elevate the look and function of your build.
