The Subaru Impreza WRX and STI, chassis code GD/GG, represent a lineage of performance-oriented compact vehicles known for their potent turbocharged Boxer engines and advanced Symmetrical All-Wheel Drive systems. For the 2008 model year, these vehicles offered distinct performance profiles, with the WRX featuring the EJ255 engine and a 5-speed manual transmission, and the STI equipped with the more powerful EJ257 engine, a 6-speed manual transmission, and the Driver Controlled Center Differential (DCCD) for enhanced handling and traction control. Their rally-inspired heritage and robust engineering made them highly regarded in the sport compact segment, offering a compelling blend of acceleration, all-weather capability, and driver engagement.

This service repair manual provides comprehensive coverage for the 2008 Subaru Impreza WRX and STI, encompassing detailed procedures for engine (EJ255, EJ257) and transmission maintenance, repair, and overhaul. It includes extensive sections on chassis and suspension systems, body repair, and electrical diagnostics, complete with wiring diagrams. The manual is designed to assist owners, mechanics, and technicians in performing routine maintenance, troubleshooting complex issues, and executing in-depth repairs, ensuring the optimal performance and longevity of these iconic vehicles.

The Subaru Impreza WRX and STI, chassis code GD/GG, represent a lineage of performance-oriented compact vehicles known for their potent turbocharged Boxer engines and advanced Symmetrical All-Wheel Drive systems. For the 2008 model year, these vehicles offered distinct performance profiles, with the WRX featuring the EJ255 engine and a 5-speed manual transmission, and the STI equipped with the more powerful EJ257 engine, a 6-speed manual transmission, and the Driver Controlled Center Differential (DCCD) for enhanced handling and traction control. Their rally-inspired heritage and robust engineering made them highly regarded in the sport compact segment, offering a compelling blend of acceleration, all-weather capability, and driver engagement.

This service repair manual provides comprehensive coverage for the 2008 Subaru Impreza WRX and STI, encompassing detailed procedures for engine (EJ255, EJ257) and transmission maintenance, repair, and overhaul. It includes extensive sections on chassis and suspension systems, body repair, and electrical diagnostics, complete with wiring diagrams. The manual is designed to assist owners, mechanics, and technicians in performing routine maintenance, troubleshooting complex issues, and executing in-depth repairs, ensuring the optimal performance and longevity of these iconic vehicles.