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Nismo OEM exhaust compared to aftermarket...

Originally Posted by Lenny there are two cats; one per header in most exhaust layouts, the catalic converters are where a lot of back-pressure builds up due to the setup,

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Old 09-01-2010, 08:32 PM   #17 (permalink)
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Quote:
Originally Posted by Lenny View Post
there are two cats; one per header

in most exhaust layouts, the catalic converters are where a lot of back-pressure builds up due to the setup, hfcs free up that pressure and allow for a briskier throttle response, though often at the expense of some high-end power (loss of back-pressure in high rpms tends to lose hp, tho i'm not sure if thats the case with the Z)
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