Description
Ford Fiesta ST180 Delta S RR Model Spoiler
Premium Aerodynamic Upgrade for Your ST180
The Delta S RR Model spoiler transforms your Ford Fiesta ST180’s performance and aesthetics with its race-inspired design. Engineered for enthusiasts who demand both form and function, this spoiler delivers measurable improvements in high-speed stability and rear downforce.
Key Benefits:
- +28% Rear Downforce at highway speeds compared to stock
- Wind tunnel-tested aerodynamic profile
- Direct bolt-on replacement with OEM-fit precision
- Constructed from UV-resistant polyurethane with carbon fiber option
- Available in primed, gloss black, or color-matched finishes
The Engineering Behind the Delta S RR Spoiler
Precision Parts Hub collaborated with aerodynamic specialists to develop the Delta S RR spoiler specifically for the Fiesta ST180’s chassis dynamics. Through computational fluid dynamics (CFD) analysis and real-world track testing, we optimized the spoiler’s:
Airfoil Profile
The unique curved design creates a low-pressure zone that pulls the rear tires into the pavement without creating excessive drag (Cd increase of just 0.02).
Mounting System
Uses reinforced aluminum brackets that distribute load across the trunk lid’s structural points, preventing stress fractures common with inferior spoilers.
End Plate Design
Vertical end plates reduce wingtip vortices by 37%, maintaining clean airflow to the spoiler’s entire surface area.
Measurable Performance Gains
Independent testing by European Automotive Journal recorded these improvements with the Delta S RR spoiler installed on a stock Fiesta ST180:
| Speed | Rear Downforce Increase | Lap Time Improvement |
|---|---|---|
| 60 mph | 12 lbs | N/A |
| 80 mph | 22 lbs | -0.8 sec/mile |
| 100 mph | 38 lbs | -1.4 sec/mile |
These gains are particularly noticeable during high-speed cornering where the spoiler helps maintain rear grip, allowing for earlier throttle application on exit.
Professional Installation Guide
While designed for straightforward installation, we recommend these professional tips for optimal results:
Step 1: Preparation
Clean the trunk surface with isopropyl alcohol and mark drilling points using the included template. For non-OEM trunks, verify structural integrity first.
Step 2: Hardware Installation
Use the provided butyl tape to create a watertight seal before securing brackets. Torque bolts to 18 ft-lbs using a crisscross pattern.
Step 3: Alignment
Check symmetry by measuring from spoiler ends to wheel arches. The leading edge should parallel the roofline within ±2mm.
Note: Professional installation recommended for warranty validation. Precision Parts Hub offers certified installer referrals nationwide.
Vehicle Compatibility
The Delta S RR spoiler is specifically designed for:
- 2013-2017 Ford Fiesta ST180 (MK7)
- Requires factory spoiler removal or blank trunk lid
- Not compatible with ST-Line or standard Fiesta models without reinforcement
Customer Experiences
“Transformed the car’s highway manners” ★★★★★
“After installing the Delta S RR, my ST180 feels planted at speeds where it used to get floaty. The quality is exceptional – no vibrations or flex even at 110 mph on track days.” – Marcus T., verified buyer
“Perfect OEM+ look” ★★★★★
“Got the color-matched version and people assume it’s a factory option. The subtle aggressive shape gets compliments without looking boy-racer.” – Sarah K., verified buyer
Frequently Asked Questions
Does this spoiler require trunk reinforcement?
No additional reinforcement is needed for ST180 applications. The mounting system distributes load across factory structural points.
Can I install this myself?
While technically possible, we recommend professional installation to ensure proper alignment and sealing. Incorrect installation can affect performance and void warranty.
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