Holley is a well-known brand in the automotive industry that offers high-quality products for various applications. In this review, we will take a closer look at some of their most popular intake systems and fuel rail kits designed specifically for General Motors (GM) LS engines. 1. Holley 300-122BK Left Side Hi-Ram Modular Intake System: The Holley 300-122BK is a left side hi-ram modular intake system designed for GM LS engines. This product features a high-flow, lightweight aluminum design that improves airflow and horsepower output. The modular construction allows easy customization to suit individual engine needs. Additionally, the included fuel rail kit provides precise fuel delivery and eliminates the need for additional parts. Overall, this intake system is an excellent choice for those looking to improve their LS engine's performance without breaking the bank. 2. Holley 300-122 LS Hi-Ram Modular Intake System: The Holley 300-122 is a right side hi-ram modular intake system designed for GM LS engines. This product features a similar high-flow, lightweight aluminum design as the left side version but with the added benefit of being able to use any standard LS throttle body. The modular construction allows easy customization to suit individual engine needs. Additionally, the included fuel rail kit provides precise fuel delivery and eliminates the need for additional parts. Overall, this intake system is an excellent choice for those looking to improve their LS engine's performance without breaking the bank. 3. Holley 850001 Holley Sniper Hi-Ram Fabricated Fuel Rail Kit: The Holley Sniper Hi-Ram fabricated fuel rail kit is a high-quality product designed for GM LS engines. This product features a lightweight, durable aluminum design that provides precise fuel delivery and eliminates the need for additional parts. The included TBS black sniper sheet metal intake manifold is also of excellent quality and features a removable top 90mm throttle body bore. Overall, this fuel rail kit is an excellent choice for those looking to improve their LS engine's performance without breaking the bank. 4. Holley 300-123 LS Hi-Ram Modular Intake System: The Holley 300-123 is a right side hi-ram modular intake system designed for GM LS engines. This product features a high-flow, lightweight aluminum design that improves airflow and horsepower output. The modular construction allows easy customization to suit individual engine needs. Additionally, the included fuel rail kit provides precise fuel delivery and eliminates the need for additional parts. Overall, this intake system is an excellent choice for those looking to improve their LS engine's performance without breaking the bank. 5. Holley 300-117BK Left Side Hi-Ram Modular Intake System: The Holley 300-117BK is a left side hi-ram modular intake system designed for GM LS engines. This product features a high-flow, lightweight aluminum design that improves airflow and horsepower output. The modular construction allows easy customization to suit individual engine needs. Additionally, the included fuel rail kit provides precise fuel delivery and eliminates the need for additional parts. Overall, this intake system is an excellent choice for those looking to improve their LS engine's performance without breaking the bank. 6. Holley 300-117 EFI Hi-Ram Intake Manifold with 1 x 105 mm GM LS Throttle Body: The Holley 300-117 is an EFI hi-ram intake manifold designed for GM LS engines. This product features a high-flow, lightweight aluminum design that improves airflow and horsepower output. The included throttle body provides precise control over engine performance. Additionally, the fuel rail kit provides precise fuel delivery and eliminates the need for additional parts. Overall, this intake manifold is an excellent choice for those looking to improve their LS engine's performance without breaking the bank. 7. Holley 300-116 Efi Hi-Ram Intake Manifold With 1 X 92 Mm Gm Ls Throttle Body: The Holley 300-116 is an EFI hi-ram intake manifold designed for GM LS engines. This product features a high-flow, lightweight aluminum design that improves airflow and horsepower output. The included throttle body provides precise control over engine performance. Additionally, the fuel rail kit provides precise fuel delivery and eliminates the need for additional parts. Overall, this intake manifold is an excellent choice for those looking to improve their LS engine's performance without breaking the bank. 8. Holley 832142 Sniper Sheet Metal Intake Manifold Hi-Ram Fabricated Race Series w/Removable Top 90mm Throttle Body Bore Incl. Fuel Rail Kit/TBS Black Sniper Sheet Metal Intake Manifold: The Holley Sniper sheet metal intake manifold is a high-quality product designed for GM LS engines. This product features a lightweight, durable aluminum design that provides precise fuel delivery and eliminates the need for additional parts. The included TBS black sniper sheet metal intake manifold is also of excellent quality and features a removable top 90mm throttle body bore. Overall, this intake manifold is an excellent choice for those looking to improve their LS engine's performance without breaking the bank. 9. Holley 300-225 LS Hi Ram Stud Kit: The Holley 300-225 is a stud kit designed specifically for GM LS engines. This product features high-quality, durable studs that provide excellent holding power and eliminate the need for additional parts. Additionally, the included hardware provides easy installation and removal of the intake manifold. Overall, this stud kit is an excellent choice for those looking to improve their LS engine's performance without breaking the bank. 10. Holley 300-125 LS Hi-Ram Modular Intake System: The Holley 300-125 is a right side hi-ram modular intake system designed for GM LS engines. This product features a high-flow, lightweight aluminum design that improves airflow and horsepower output. The modular construction allows easy customization to suit individual engine needs. Additionally, the included fuel rail kit provides precise fuel delivery and eliminates the need for additional parts. Overall, this intake system is an excellent choice for those looking to improve their LS engine's performance without breaking the bank. In conclusion, Holley offers a wide range of high-quality intake systems and fuel rail kits designed specifically for GM LS engines. These products offer excellent performance improvements while being easy to install and maintain.