Another vote for Techtron.
You may want to also change your fuel filter as well.
Thats whats going to trap the larger particles.
Your injectors could be clear, but you be could starving the fuel supply.
Just my $.02
"J"
P.S.
Be carefull running Octane boost it unless your car is designed for it.
You can do alot of damage to your heads (friend destroyed his running octance boost and NOS in his 5.0, heads weren't set up to handle the heat)