Review on ProForm 302 135 Proform 302135 Valve by Onsommoshit Mathews

That's pretty thick wood, ladies. They are difficult to tighten so you get good flat contact with gaskets and heads. Note, however, that all EFI air intakes require a larger 1" spacer (instead of the 3/8" washers that many air intakes have) to clear their sloping tops. Otherwise the oil cap and PCV bushing will literally FULL to the bottom of the intake manifold and throttle cable assembly before you even have a chance to retighten the intake manifold bolts!