If your engine does not have side carburetors, you will need to preheat the intake manifold. It is not present on all stainless steel exhausts. In order to continue to use these excellent exhausts, you will need to order this additional option.
These elbows replace the supplied exhaust elbows when the preheating option is not available.
Attention : Are delivered without gaskets and sin assembly material, take this extra, they are mentioned on the tab options.
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