PowerAid throttle body spacer. I got this on an intake I bought for a PI swap and I already have an Accufab throttle body and plenum so don't need it. It works with stock throttle bodies, not larger diameter aftermarket ones. The maker says it adds low RPM torque and throttle response and boosts fuel economy. It will clear up your acne and cut your grass too . It is supposed to fit 99-04, but I don't know why it wouldn't fit other 4.6 2Vs like 96-98 Mustangs.. American Muscle has them for $140.07 delivered, I'll go for $60 picked up in Cleveland, Ohio area or $70 shipped. [https://www.americanmuscle.com/airaid-tb-spacer-9904gt.html] PM me for pics.