The Porsche 718, with its mid-engine balance and agile dynamics, is a canvas for enthusiasts seeking to elevate its performance and aesthetics. Retrofitting the Porsche body kit from the GT4 and GT4 RS models transforms the 718 into a track-ready machine, blending race-derived aerodynamics with motorsport-inspired design. This guide explores the components, benefits, and technical considerations of upgrading to these iconic kits, ensuring your 718 embodies the spirit of Porsche’s GT lineage.

The GT4 vs. GT4 RS Body Kits: Key Differences

The GT4 and GT4 RS body kits share a focus on aerodynamics and lightweight construction but differ in intensity and engineering:

1. GT4 Body Kit: Designed for balanced performance, it includes aggressive front splitters, rear wings, and functional vents for improved cooling and downforce8.

2. GT4 RS Body Kit: A more extreme variant, featuring larger aerodynamic elements, carbon fiber components, and weight-saving measures like lightweight glass and forged magnesium wheels26.

Key Components of the GT4/GT4 RS Body Kits

1. Aerodynamic Enhancements

• Front Bumper and Splitter:
  The GT4’s front bumper integrates enlarged air intakes and dive planes to channel airflow for brake and radiator cooling. The GT4 RS takes this further with a redesigned splitter and NACA ducts on the hood, reducing front-end lift by 25% compared to the base GT4211.

• Rear Wing and Diffuser:
  The GT4’s fixed rear wing generates significant downforce, while the GT4 RS adopts a swan-neck wing inspired by the 911 RSR GT race car. This design minimizes airflow disruption and increases downforce by up to 20%611. The rear diffuser, with vertical fins, accelerates underbody airflow to balance stability2.

2. Lightweight Materials

• Carbon Fiber Components:
  The GT4 RS kit uses carbon fiber-reinforced plastic (CFRP) for parts like the front splitter, fender vents, and rear wing, reducing weight by up to 50 kg compared to steel equivalents. The Weissach Package adds carbon fiber hoods and mirror caps for further weight savings67.

• Forged Wheels and Tires:
  Both kits pair with lightweight forged wheels (e.g., 20-inch GT4 alloys) and Michelin Pilot Sport Cup 2 semi-slick tires for optimal grip28.

3. Functional Styling

• Wheel Arch Extensions:
  Flared arches widen the track by 1.5 inches, accommodating larger wheels and enhancing the car’s aggressive stance58.

• Exhaust Systems:
  Quad exhaust tips (GT4 RS) or dual oval tips (GT4) complement the diffuser design, optimizing exhaust flow and acoustics56.

Performance Benefits

1. Downforce and Stability:
   The GT4 RS kit generates 385 lbs of downforce at 124 mph, improving high-speed cornering grip. The front splitter reduces lift by 30%, ensuring balanced handling26.

2. Weight Reduction:
   Carbon fiber components and lightweight glass lower the GT4 RS’s curb weight to 1,415 kg, enhancing power-to-weight ratios and acceleration (0-100 km/h in 3.4 seconds)67.

3. Cooling Efficiency:
   Vented hoods and enlarged intakes reduce engine bay temperatures, critical for sustained track use11.

Installation Considerations

1. Professional vs. DIY:

• Complexity: Aligning aerodynamic components (e.g., swan-neck wing) requires precision to avoid disrupting airflow. Professional installers use Porsche-specific templates for OEM fitment78.

• Electrical Integration: Retrofitting active aerodynamics or sensors (e.g., parking assist) may require reprogramming the 718’s control units6.

2. Suspension and Braking Upgrades:

• PASM Suspension: Lowering the chassis by 10 mm improves stability8.

• Carbon Ceramic Brakes (PCCB): Essential for managing the increased speeds and downforce2.

3. Legal and Warranty Compliance:

• Fixed wings or protruding splitters may violate regional regulations. Verify local laws before installation7.

• Porsche Tequipment-certified kits preserve factory warranties, unlike aftermarket alternatives8.

Cost Breakdown

• GT4 Body Kit: 15,000–15,000–25,000 (including carbon fiber elements)8.

• GT4 RS Body Kit: 25,000–25,000–40,000 (with Weissach Package)67.

• Labor and Paint: 4,000–4,000–8,000 for professional installation and color matching7.

Conclusion: Embracing the GT Ethos

Upgrading the Porsche 718 to GT4 or GT4 RS body kits is a commitment to motorsport excellence. These Porsche body kits not only enhance aesthetics but also unlock race-proven aerodynamics and lightweight performance. While the GT4 kit offers a balanced blend of street and track capability, the GT4 RS variant pushes boundaries with extreme weight savings and downforce.

For enthusiasts, this transformation is more than cosmetic—it’s a tribute to Porsche’s racing legacy. Whether carving mountain roads or dominating track days, a GT4-inspired 718 embodies the brand’s relentless pursuit of engineering perfection.