I have one, it seems to shift your powerband up...they say they give you better lower torque, but i don't know. i made my own using the gasket that goes on the botm of the TBI as a template, made out of 1" alum. i think it helped give a couple of extra hp at about 3000 RPM...
Craig
'89 S-10 P/U 4.3L 31" Yoko M/Ts (For Sale!)/wwwthreads_images/icons/shocked.gif
'99 S-10 2.2L 2WD 5 Speed Stepside Totally Stock /wwwthreads_images/icons/frown.gif
'88 Kawasaki Mojave (FOR SALE)/wwwthreads_images/icons/cool.gif
Craig
'89 S-10 P/U 4.3L 31" Yoko M/Ts (For Sale!)/wwwthreads_images/icons/shocked.gif
'99 S-10 2.2L 2WD 5 Speed Stepside Totally Stock /wwwthreads_images/icons/frown.gif
'88 Kawasaki Mojave (FOR SALE)/wwwthreads_images/icons/cool.gif