Assuming thats your car in the avatar...My99 WRX

Injectors - Get Sti 550cc Side feeds, or if you prefer something bigger. SARD 800cc - Plenty of headroom. But your gonna need a ECU upgrade if you dont already have it for injectors of this size.

Fuel Pump - Cant go past the good ol Bosch 044. Dont get Walbro. Walbro makes good performing pumps but they have long term reliability issues. BOSCH FTW!

Tyres - No Idea, Dont know shit about tyres