TwinTurbo.NET: Nissan 300ZX forum - So your saying once the cars warmed up the pre cats have no
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Subject So your saying once the cars warmed up the pre cats have no
     
Posted by Z32TT-R on December 13, 2010 at 12:54 AM
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In Reply To down pipes have no effect on emissions - they are only posted by Bernie (NoVA) on December 12, 2010 at 11:16 PM
     
Message effect in keeping pollution to a minimum? doesnt make too much sense to me. I know i could pass with just main cats, but the rate at which is considered failing is getting alot more strict as time progresses it seems, i dont see how the precats wouldnt help more with reducing the overall pollution (when warmed up also) coming out the exhaust. Visual i'm not even worried about.

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