Billet Specialties Inc. has just released a new supercharger lid and showcased it at the SEMA 2024 event. Their new supercharger lid is designed to bring a performance improvement to GM’s supercharged LT4 engines. While it looks great, it’s not just cosmetic; it’s also an engineered solution based on the company’s previous experience with LT4 accessory drives.
Not every customer wanted to give their engine a Corvette-badged lid, so Billet Specialties designed a more versatile lid. The company went a step further and gathered input that allowed them to tweak the internal design so as to be able to accommodate both the short, as well as the tall intercooler bricks while maintaining compatibility for both Gen-1 and Gen-2 LT4 superchargers.
One of the interesting features of this new lid is the design on the bottom. This new design enhances airflow over the intercooler bricks so that temperatures will be more consistent during operation. Dyno testing revealed a noticeable gain of up to eight horsepower at the wheels, thanks to the improved cooling. The lid itself is solid proof of Billet Specialties’ enthusiasm for quality. With precision machining, they chose 6061-T6 billet aluminum as the medium of choice, providing a supercharger lid that speaks of strength, performance, and corrosion resistance.
Once the aluminum is machined, it gets hard coat anodized to provide a durable finish that’s resistant to UV. The coating protects the aluminum underneath but also enhances its look. Billet Specialties did not end there. They also include high-quality, stainless-steel ARP 12-point fasteners. Known for their strength, ARP fasteners are a staple in high-performance applications.
Billet Specialties knows that different people have unique tastes in the aesthetics of their engines. That is why the company also decided to offer the lid in two finishes. It is available in the standard hard-coat anodized coating or a raw, machined finish. This way, customers can customize their cars even more to their liking, since they can either polish the raw version or get their preferred finish for the engine bay. The new LT4 supercharger lid features remarkable performance enhancement capabilities, high-quality materials, and customizability, making it a very desirable upgrade option for the LT4 engine.
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