The RWB kit transforms standard Porsche 911 bodies into wide-stance, race-inspired machines using fender flares, wide wheels, and subtle suspension tuning. Owners often choose this kit to achieve a bold street presence and better track balance without radical internal changes.
This guide walks through key product characteristics, fitment considerations, and real-world driving impact so you can decide whether an RWB kit suits your driving style and expectations.
| Kit Component | Material | Fitment Years | Mounting Style |
|---|---|---|---|
| Front Fender Flares | Fiberglass reinforced plastic | 1974–1989 | Bracket and bolt-on |
| Rear Fender Flares | Fiberglass reinforced plastic | 1974–1989 | Bracket and bolt-on |
| Wide Rear Wings | Fiberglass or carbon fiber | 1974–1989 | Bolt-on spoiler mount |
| Suspension Adjustments | Steel springs, adjustable dampers | Model dependent | Coilover or spring seat |
| Brake Clearance Kit | Aluminum spacers | 1974–1989 | Bolt-on spacers |
Understanding RWB Fitment and Design Language
RWB design targets the original 911 shape from 1974 to 1989, emphasizing longer overhangs and clean side panels. The wide arches, low bumpers, and subtle rear wing create a balanced silhouette that is recognizable yet not overly aggressive for daily use.
Fitment precision is critical because each component aligns with specific mounting points along the unibody. Correct installation preserves factory alignment angles and ensures that tires stay within the widened fender openings at full steering lock.
Performance Handling and Suspension Setup
Handling gains come from wider track and larger wheels, which increase gyroscopic stability in corners. The RWB kit typically pairs 15- to 17-inch wheels with performance tires to improve grip without excessive sidewall flex.
Suspension Components
Coilover kits allow ride height and camber adjustments that help the car sit level while maintaining tire clearance. Stiffer springs and higher-rate dampers reduce body roll, but you can tune them to keep comfortable compliance for street driving.
Installation Process and Clearance Checks
Professional installation is recommended because it involves alignment updates, brake line routing, and careful trimming of inner fenders. Skilled fitters check steering angles and suspension travel to avoid binding at full lock or over rough roads.
Clearance Steps
Technicians verify arch clearance at bump stops, test steering lock proximity to tires, and confirm brake caliper spacing. They also inspect panel gaps and seam heights so the finished look remains factory clean.
Exterior Styling and Material Choices
Most RWB kits use fiberglass for a light, strong shell that follows the original panel shapes closely. High-quality tooling reduces warping and ensures repeatable fitment across multiple cars of the same year.
Painting and finishing practices matter because sharp edges between body panels and flares create a crisp, race-inspired look. Matte, gloss, or metallic finishes can match your personal taste while highlighting the widened stance.
Key Takeaways and Recommendations
- Choose components that match your specific 911 model years for clean bolt-on fitment.
- Prioritize professional installation to protect alignment, suspension geometry, and wiring.
- Balance track width increases with tire size to avoid rubbing in daily driving conditions.
- Plan for periodic checks of wheel well gaps and suspension limits after long-distance travel.
FAQ
Reader questions
Will an RWB kit affect my annual vehicle inspection or registration?
Laws vary by region, but many inspections focus on tire overhang and lighting positions. Ensure your flares do not interfere with turn signals, brake lights, or license plate placement to avoid rejection.
Can I install wider wheels and tires without changing the kit components?
Yes, you can often fit slightly larger wheels, but verify overall diameter, offset, and brake clearance. Use a fitment calculator and a professional installer to prevent rubbing against the flares during suspension compression.
Do RWB kits work with modern driver assistance systems?
Most adaptive cruise control and lane-keeping cameras mount behind the front fascia, so the kit rarely interferes. Confirm camera and radar positions during install to maintain full functionality of safety features. RWB setups can increase desirability among enthusiasts but may narrow the buyer pool for purists. Document professional installation and retain original parts if you plan to restore the vehicle to factory spec later.