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Discussion Starter · #1 ·
what is a cat-back exhaust system mean actually? Is a cat-back exhaust system includes rear section and Y-pipe (with catalytic on), or it is a rear section with catalytic? Thanks for all helps.
 

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The GTR exhaust is made of 3 parts

1.Downpipe "Stock contains 2 cats"


2.Midpipe or Y-pipe "Stock contains 2 cats + 1 muffler"


3.Catback or rear section "Stock contains 2 mufflers"
 

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yes, the cat-back, is the exhaust system after the catalytic converters, since the cats since in the stock y-pipe, the cat back system is the pieces after this
 

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It's pretty much implied in the name, so its the exhaust after catalytic converter and all the way back to the exit - hence "cat-back".
 

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Discussion Starter · #6 ·
The GTR exhaust is made of 3 parts

1.Downpipe "Stock contains 2 cats"


2.Midpipe or Y-pipe "Stock contains 2 cats + 1 muffler"


3.Catback or rear section "Stock contains 2 mufflers"
thanks! so the OEM exhaust doesn't have the catalytic converters?
 

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Nope
 
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