they hold in heat under the hood, i removed them and now my KKM is actually cool to the touch smile

but some people are "stock" and like the reduced noise factor smile

Todd Christ SVT Contour Registry
MODS: KKM Intake, SHO Shop Y-Pipe, Bullit Fuel Door, Edelbrock RPM Resonator
'98 E0 SVT Contour #1037 of 6535