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Gregor12 · 02-01-2016, 11:53 PM

Considering they were both installed at the same time there is no way of knowing for sure. But it's not going to be one or the other. The cats can't be that restrictive to where it's the only choke point of the entire exhaust system. With that being said I'm sure the cat back picked up some power as well. If you're going to drop the loot on a cat back. Another 500 for test pipes is well worth it. The exhaust did not have resonators but the test pipes did and the car still wasn't loud. Perfect in my opinion. So if you were looking for power upgrades. I would top off the cat back with test pipes.

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02-01-2016, 11:53 PM	#16 (permalink)
Gregor12 Enthusiast Member Join Date: Oct 2013 Location: CHARLOTTE, NC Posts: 433 Drives: 2012 370z 6mt sport Rep Power: 12	2016 Nismo HP gain. Considering they were both installed at the same time there is no way of knowing for sure. But it's not going to be one or the other. The cats can't be that restrictive to where it's the only choke point of the entire exhaust system. With that being said I'm sure the cat back picked up some power as well. If you're going to drop the loot on a cat back. Another 500 for test pipes is well worth it. The exhaust did not have resonators but the test pipes did and the car still wasn't loud. Perfect in my opinion. So if you were looking for power upgrades. I would top off the cat back with test pipes. Sent from my iPhone using Tapatalk Last edited by Gregor12; 02-01-2016 at 11:57 PM.