Z1 test pipes vs others

ghotnit

Test pipes are louder than cats and loudness ,as stated before, is relative. In my experience with test pipes the sound is just one concern. It seems a tune is necessary address the O2 sensors. Even with J-bungs my car did not run well before the tune and occasionally I still get a CEL from the cats not being there and the O2 sensors not registering enough of a change in the exhaust gases and upsets the ECU. I believe this would be an issue with any mod that removes cats. I think ,IMHO, high flow cats are a good compromise or even resonated test pipes if you are concerned about volume but be aware of the possibility that the O2 sensors may not be happy.

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'14 Nismo AAM 3" TD / AAM Test pipes / AAM CAI / Lowered on Swift / Synolimit Ported TB, upper and lower manifold /DW 1000cc injectors and 340 pump / ECUtek tuned by Hal @ Dynosty / 331whp/268wtq on E85