Add 'RACING cat-back system with selectable tail pipes, without homologation'

RACING-cat-back-system-with-selectable-tail-pipes%2C-without-homologation.md

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+Unwanted reactions result in the formation of hydrogen sulfide and ammonia, which poison catalysts. Nickel or manganese is sometimes added to the washcoat to limit hydrogen-sulfide emissions.[citation needed] Sulfur-free or low-sulfur fuels eliminate or minimize problems with hydrogen sulfide. It also boasts the ultimate in customization, including the optional 700+ horsepower Shelby GT S/C version.
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+If you&nbsp