AFB Tuning

If those are like the Edelbrock AFBs, the secondary air door has weights on it. They have to be either trimmed and lightened up, or drilled out and lead weights pressed in to make them heavier. Yeah, it's kinda a pain. That's why the AVS and Thermoquad and Street Demons are all a little easier in that department. The secondary air door is adjusted on the outside of all of them.