RPC VORTEC Aluminium Dual Plane Manifold suit S/B Chev 1996-on Polished Finish (RPCR1107POL)SBC DUAL PLANE MANIFOLD Fits 1996 on Cast Iron & Aftermarket Cylinder Heads Part Number: RPCR1107POL RPC square bore, dual plane intake manifolds add performance, improved throttle response and increased torque to your 1996 2002 SBC V8 engines with GM Vortec L31 cast iron heads. Made out of high quality cast aluminum and available in satin, polished and black finishes. The square bore flange accepts most square bore non EGR 4 bbl carburetors.