Page 179 of GM Performance Parts 2006 Catalog by GM Parts Direct

Intake Manifold, ZZ Series E Intake Manifold, Vortec Head Design F Aluminum Intake Manifold, Vortec Head Design (dual pattern carb mount) G 177 Intake Manifold, Vortec Design for TBI H NOTE: NOTE: INTAKE MANIFOLDS, GASKETS COMPONENTS GMPPs wide range of intake manifolds offers enthusiasts everything from mild street performance to all-out competition applications even fuel injection! Best of all, every GMPP intake design has been tested to deliver optimal performance for GM engines. E. 10185063 Intake Manifold, ZZ Series Aluminum manifold used on all ZZ series 350 HO engines and also can be used on all small-blocks through 1986. Dual-pattern carburetor flange is approximately 1/2" lower than the LT-1 intake, while producing the same horsepower. Provisions for all late-model accessory brackets, EGR, and an integral hot air choke. A heat shield can be mounted underneath for improved performance. F. 12366573 Intake Manifold, Vortec Head Design Designed for 283-400-cubic-inch engines using Vortec cylinder heads P/N 12464298 or 12558060. This manifold only has four bolts per side to attach it to these cylinder heads. High-rise design maximizes horsepower and delivers a broad torque curve. It accepts a square-bore 4150-style carburetor and includes externally plumbed hot water crossover passage. Use manifold gasket P/N 12529094 and eight attachment bolts, P/N 12550027. Vortec heads were originally released on truck engines; check for hood clearance, especially with Corvette. G. 12496820 Aluminum Intake Manifold, Vortec Head Design (dual pattern carb mount) This dual bolt pattern manifold can be used with Vortec cylinder heads P/N 12529093, P/N 12558060, P/N 12497186 or P/N 12464298 and will accept Holley or Quadrajet-style carburetors. Manifold will accept an EGR, P/N 17052693. Requires intake manifold gasket P/N 12529094 and eight special manifold bolts, P/N 12550027. H. 12496821 Intake Manifold, Vortec Design for TBI Designed for throttle body fuel injection, this aluminum intake will work with all Vortec cylinder heads, including P/N 12529093, P/N 12558060, P/N 12497186 or P/N 12464298. Also accepts EGR. The exhaust manifold from 1996-and-newer pickup trucks with RPO L31 350 engine, P/N 12557828, is drilled and tapped to accept an EGR tube. EGR pipe P/N 10220275 and fitting P/N 12552329 can be used with EGR Valve P/N 17113457 and gasket P/N 12337972.

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