Exhaust Manifold - Toyota Supra User Booklet

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5. Exhaust Manifold

The exhaust manifold is made up of 2 parts, No. 1 and No. 2, to reduce exhaust gas interference and thereby improve
the engine performance. They are fitted via a stainless steel gaskets having a laminated structure to increase sealing
performance.
In the models except for California, the exhaust manifold is made of cast iron having outstanding resistance against
high temperatures, and the heat insulator has a double–layered structure to suppress noise.
In the California specification models, the stainless steel exhaust manifolds are adopted.
And a heat insulator surrounds each exhaust manifolds, providing a double–structured integrated manifolds, as shown
below. Using these exhaust manifolds reduces HC emissions when engine is being warmed up and reduces engine
weight.
Except California Specification ModelsA
California Specification ModelsA
ENGINE — 2JZ–GE ENGINE
A—A' Cross Section