The Boxster GT3 Brake Duct Spoiler Upgrade is hands down the cheapest and easiest upgrade for adding performance or tracking your car. The GT3 upgrade improves aerodynamics and the volume of air to cool your front rotors. If you track your Boxster or do a lot of long, high-speed driving, this is a simple and … Continue reading Boxster GT3 Brake Duct Spoiler Upgrade