Don't forget to do the .
This will help eliminate any additional stumble due to improper readings generated from low-speed engine heat.
Relocating it to the ram-air gives it proper ambient air thus allowing the sensors to read appropriately.
Mods;
Small Airbox Cut-Away
Pair Valve Removal
Block off tabs
AITS Relocation
Muzzy Fan
Manual Fan Switch
Honda Temp Sensor (10 Deg Celsious lower kick in)
Better mixed Coolant (ie., exmpl, Prestone Dex-Cool(50%) Distilled Water (40%) Red-Line Water Wetter (10%) )
To answer you questions;
1) If you do the PAIR removal and block off, do you have to do the air box mod or vice versa?
No, but the Pair Removal/Block Off mod is used primarily to prevent back fire when after installing an after market exhaust system.
2) Is it ok to do the mod with an after market air filter? what gains is there by doing it and how do you do it?
Yes. You can use and aftermarket air filter with or without the block off mod. Gains with or without are marginal either way with just looking at the block off as the point of focus.
3) Any pics on your air box mod?