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Discussion Starter #1
Wanted - any type high flow cats for Impala lfx 2015 lt. I have the Magnaflow exhaust cat back and need the replace the restrictive stock cats. Thanks !
 

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what makes you think the stock cats are restrictive? Manufacturers are designing exhaust systems to flow as best as they can as a good flowing exhaust system = better fuel economy. Now if they are old? That might be an issue. But 2015 is not really all that old.
 

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Discussion Starter #3
There is alot of research and even a thread here showing the stock cats are more restrictive and have more bends than some of the better high flow cats.
 

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high flow cats for Impala lfx 2015 lt PM 929-350-08 thirty five if you’re interested thank you.


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Discussion Starter #5
Scammer reported
 
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