When you're upping the boost, more fuel is a must. the WalbroWRX/STi 255 liter per-hour fuel pump is the staple fuel pump for the performance market. Chances are, if someone's selling a high-volume fuel pump, it's a rebadged Walbro. Walbro's GSS342 fuel pump is capable of flowing 255 liters per hour (lph), making it unsurpassed for performance, particularly in a turbocharged vehicle like the WRX and STi. As if this weren't enough, Walbro's WRX/STi/Forester-specific setup kit makes installation a cinch, as it includes the filter, isolator, and all other necessary hardware for a direct installation. While an installation kit is not required, we recommend it because it includes a new filter. Please note, this pump will not fit your 08+ WRX or STi without modification.