For the past 15 years, AVO Turboworld has been a world market leader in intercooler technology,proven on the street and on the track. AVO bar and plate intercoolers are highly efficient and offer a greater surface area than similarly sized tube and fin designs. Many hours of R&D ensure easy and accurate fitment as well as high efficiency required in all Subaru performance applications. Bolting an AVO intercooler onto an otherwise stock engine reaps exceptional results, and a great gain in power on highly modified cars! The core measures a hefty 20 5/8 x 10 3/8 x 4 inches, making it one of the largest TMIC's available. It has been designed as a drop in replacement for the stock intercooler - no cutting, grinding, or other work will be necessary to get it in. Good for up to 400HP and with less than 1 PSI in pressure drop, you can be sure of reliable power support on your STI!