Bilstein PSS10 Coilovers WRX / STI (2008-2014) Legacy GT Engine (10-up) Injen has seen gains of

Injen has seen gains of over 10 HP with this intake alone

The stock part is made of silicone and rubber with no reinforcement to it

The HKS Hi-Power Carbon Titanium's full straight

The AWE Touring Edition features a direct bolt-on

All kits are compatible with OEM valve covers as well as OEM and most aftermarket spark plug wire covers

Bilstein PSS10 Coilovers WRX / STI (2008-2014) Legacy GT Engine (10-up) Injen has seen gains ofBilstein's PSS10 system for the Subaru WRX STI is the latest addition to their suspension lineup, replacing the legendary PSS9 System. Evolving from a history of worldwide racing dominance, Bilstein created the ultimate automotive performance suspension system for the Subaru WRX STI the PSS9 adjustable coil over system. After the rave reviews and feedback of thousands of PSS9 equipped Subaru owners, Bilstein has raised the bar once again and evolved