Fiberglass hoods are one of the most popular aftermarket upgrades for both cars and trucks. Fiberglass also known as FRP (fiberglass reinforced plastic) is a material that is lightweight, durable and easily formed into complex shapes. A few of the benefits to aftermarket fiberglass hoods is that they are light weight and allow you to alter the look of your vehicle without investing in high paint and labor costs. Some of the more popular styles of fiberglass hoods also offer improved engine cooling thanks to strategically placed vents that will either vent cool air to the engine bay or extract hot air out of the engine bay. Some applications actually direct cold air directly to the air intake system in a ram air or shaker style hood.