Edelbrock part #21163 Performer Vortec intake manifold is based on the popular and powerful Edelbrock #2101. This dual-plane intake is designed for the street rod, industrial and engine swap market utilizing 262-400 c.i.d. Chevy V8's with 1996 and later Vortec (L31) cast iron or the Edelbrock E-Tec aluminum heads. Manifold has provisions for external water bypass and may be used on either Vortec blocks or 1995 and earlier blocks. No provision for exhaust heated chokes. This manifold offers a polished finish for a brilliant shine and classic look.