BMW 4 Series Body Kit Installation Review

Transforming a BMW 4 Series Gran Coupe with an Aero Kit

This review details the transformation of a pre-facelift BMW 420i Gran Coupe into an M4 Competition-inspired vehicle, including the installation of a full body kit and exhaust tuning. The project was completed at Nangman Trade, a one-stop car care center in Korea. The goal was to enhance the vehicle's aggressive aesthetic, mirroring the high-performance M4 Competition model, while also addressing minor front-end accident repairs.

Body Kit Installation and Results

The process involved fitting a comprehensive body kit, which typically includes a new front bumper, rear bumper, side skirts, and sometimes a spoiler or diffuser. For this BMW 4 Series, the chosen kit aimed to replicate the muscular stance of the M4 Competition. The installation required careful alignment and fitting to ensure seamless integration with the car's existing body lines. Before the kit was installed, the 420i Gran Coupe had a more understated look. After the body kit installation, the vehicle exhibited a significantly more aggressive and sporty profile, with wider-looking bumpers and more pronounced side skirts. The front lip installation, in particular, lowered the visual center of gravity, giving it a more planted appearance. The rear bumper also contributed to a wider, more imposing stance. The exhaust tuning complemented the visual upgrades, promising a more thrilling auditory experience.

Durability, Materials, and Cost Considerations

Body kits are often made from materials like Fiberglass Reinforced Plastic (FRP) or polyurethane. FRP kits are generally lighter and can be more affordable but may be more brittle and prone to cracking on impact. Polyurethane kits are more flexible, durable, and impact-resistant, making them a better choice for longevity, though they can be more expensive. The durability of the body kit depends heavily on the material quality and the professional skill of the installation. Proper maintenance, including regular cleaning and avoiding harsh impacts, will extend its lifespan. The cost for a full body kit installation on a BMW 4 Series can vary significantly. While specific pricing for this project wasn't detailed in Korean Won, such comprehensive kits and professional installation in Korea can range from approximately ₩2,000,000 to ₩5,000,000 (roughly $1,500 to $3,700 USD), depending on the kit's brand, material, and the complexity of the installation, including any necessary paintwork and the accident repair.

Installation Process:

1. Preparation: The original bumpers and side skirts are removed. The new body kit components are test-fitted to ensure proper alignment and fitment.
2. Modification & Fitting: Minor adjustments or modifications may be needed for a perfect fit. This includes ensuring all mounting points align with the vehicle's chassis.
3. Surface Treatment: The new parts are sanded and prepared for painting. Any imperfections are filled and smoothed.
4. Painting: The body kit components are painted to match the BMW 4 Series' original paint code.
5. Final Installation: The painted components are securely attached to the vehicle, completing the transformation.

This one-stop service also included exhaust tuning and accident repair, demonstrating the comprehensive capabilities of the workshop. For BMW 4 Series owners considering a body kit, weighing the aesthetic gains against the cost, material durability, and the importance of professional installation is crucial for a satisfying outcome.