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Exhaust 5.7 HEMI Exhaust Discussion


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  #1  
Old 06-22-2013, 09:10 AM
BlackDog BlackDog is offline
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Default catalytic converter??

So I bought new JBA headers, magnaflow Y pipe, and flowermasters american thunder cat back system and everything is currenty in transit. My question is if I keep my stock catalytic converter will I lose performance? is the stock catalytic converter really restrictive? If so Id rather get everything all done at once. as my wife says, If your down there might as well put it all in LOL.
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Old 06-22-2013, 09:16 AM
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Grubrunner Grubrunner is offline
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All my research has lead me to the conclusion that the OEM catalytic converters on the 4TH Gen Hemi 5.7L is more than sufficient.

When I go the LT path soon, I'm most probably leaving mine as is.

BTW, I like your wife's way of thinking......
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Old 06-22-2013, 11:23 PM
BlackDog BlackDog is offline
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hmmm interesting
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Old 06-23-2013, 01:12 AM
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chefred112 chefred112 is offline
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how big a collector is coming off the headers? My pacesetter's were 3" so i had my muffler guy do all 3" piping from the headers back. What he did was cut the cats back a little bit so the openings on ether end were 3" dia....

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