Greddy Evolution GT exhaust drone

cold · 07-09-2022, 01:52 PM

I bought this CBE used off of a guy that was really low so he had it welded together at the Y pipe and was wondering if this was the cause of all the drone in the setup or if it was just common even on unmodified Evo GTs. I'm running stock cats right now, is there any possibility that switching to test pipes would reduce the drone? I love the sound of the exhaust other than 2800-3500rpm where all the vibration and noise is.

FrankEtier · 07-10-2022, 11:36 AM

It’s got terrible drone with windows up. Stock cats, HFC, and ART pipes. I had all 3 and drones like crazy, so bad with windows up the interior panels rattled.
Switched to HKS hi power and I can comfortably ride with windows up now.

Greddy sounded awesome with windows down but too much drone otherwise.

theART · 07-10-2022, 10:38 PM

Yep, I had mine for 3 weeks and sold it, terrible drone and resonance between 3k-4k RPM. Greddy explicitly states EVO GT is designed for Turbo cars, and it shows, the 3" piping creates too much resonance in an N/A car.

You best bet is to run OEM catalytic converters, modify OEM Y pipe by welding couple of resonators and install that instead of Greddy Y pipe. Or just sell it to someone else who loves drones.

NissanZ34 · 07-15-2022, 09:43 AM

The GReddy GT Evolution exhaust system is indeed intended for forced induction applications. However it's also suitable for a bolt-on build. If resonance and drone is a problem, you could better insulate the trunk as most the exhaust sound comes from there when sitting in the car.

07-09-2022, 01:52 PM	#1 (permalink)
cold Base Member Join Date: Oct 2021 Location: Surprise, AZ Posts: 2 Drives: 15 Nissan 370z white Rep Power: 3	Greddy Evolution GT exhaust drone I bought this CBE used off of a guy that was really low so he had it welded together at the Y pipe and was wondering if this was the cause of all the drone in the setup or if it was just common even on unmodified Evo GTs. I'm running stock cats right now, is there any possibility that switching to test pipes would reduce the drone? I love the sound of the exhaust other than 2800-3500rpm where all the vibration and noise is.

07-10-2022, 11:36 AM	#2 (permalink)
FrankEtier Base Member Join Date: Jul 2019 Location: McKinney, TX Age: 48 Posts: 143 Drives: 2014 370Z SC Rep Power: 11604	It’s got terrible drone with windows up. Stock cats, HFC, and ART pipes. I had all 3 and drones like crazy, so bad with windows up the interior panels rattled. Switched to HKS hi power and I can comfortably ride with windows up now. Greddy sounded awesome with windows down but too much drone otherwise. __________________ ‘14 Topgunz Speedworks Rotrex Supercharged VR30 7AT 370Z Magma Red. @liquid.magma

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07-10-2022, 10:38 PM	#3 (permalink)
theART Base Member Join Date: Feb 2009 Location: BC Posts: 163 Drives: To Drive Rep Power: 7822	Yep, I had mine for 3 weeks and sold it, terrible drone and resonance between 3k-4k RPM. Greddy explicitly states EVO GT is designed for Turbo cars, and it shows, the 3" piping creates too much resonance in an N/A car. You best bet is to run OEM catalytic converters, modify OEM Y pipe by welding couple of resonators and install that instead of Greddy Y pipe. Or just sell it to someone else who loves drones.

07-15-2022, 09:43 AM	#4 (permalink)
NissanZ34 Base Member Join Date: Jun 2019 Location: Canada Posts: 92 Drives: 2010 370z 6MT Rep Power: 5	The GReddy GT Evolution exhaust system is indeed intended for forced induction applications. However it's also suitable for a bolt-on build. If resonance and drone is a problem, you could better insulate the trunk as most the exhaust sound comes from there when sitting in the car.