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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.
thanks! so the OEM exhaust doesn't have the catalytic converters?The GTR exhaust is made of 3 parts
1.Downpipe "Stock contains 2 cats"
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2.Midpipe or Y-pipe "Stock contains 2 cats + 1 muffler"
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3.Catback or rear section "Stock contains 2 mufflers"
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