Nissan 370Z Forum - View Single Post

sinceday1 · 04-09-2010, 08:03 PM

I've been searching for the exhaust system that will give a good deep tone, loud but not obnoxious, nor raspy. Some of my choices included F.I / ARK / HKS. When I was about to pull the trigger on ARK exhaust, Agency Power came out with their exhaust system and I decided to give it a go..

1. F.I: Although I love how they look, sound, and other whole nine yards, I simply could not wait 6 weeks for the system. My vacation plans and other would have been sacrificed in order to receive the product. Also, another factor that pulled me away was clearance issue. Many have confirmed that it's not too much of an issue when it is driven with care and etc, I didn't want to think about exhaust hitting bumps or anything like that (Roads where I live is quite CRAPPY)

2. ARK: Same deal. love how they look, sound .. BUT only thing that diverted me was how low the exhaust sit. also there seems to be quite noticeable muffler hang difference on left and right.. I know It's hard to notice, but knowing that they sit differently, I'm going to constantly look and tell myself I didn't spend 600 more and get HKS...

3. HKS: PRICE! AND SOUND...... Including shipping and tax, it would've been over 2k for just for an exhaust system. Maybe when I graduate from law school and have enough $$ floating around to dump 2k on the exhaust ..maybe. Sound wasn't something I was looking for either.

OK So.. The reason I decided on Agency Power was that it didn't have all the negatives I listed on other exhaust system (It's subjective i know..) BUT with all the sound, albeit short of performance on their Dyno. In wilful blindness, I told myself that they needed to be re-dynoed. their baseline dyno didn't even compare close to other company's claimed HP Baseline to start with.

I'll find out how exactly the exhaust will perform when I put it on a dyno. (SADLY I DONT HAVE BASELINE....)
I'm not even gonna mention butt dyno.. Well I DO FEEL the difference but dat's also subjective.

FITMENT: 9.5/10. Exhaust fits very nicely. There was a MINOR adjustment that needed to be done in order to level the "MUFFLER". Tip aligned without any adjustment. Flanges and gaskets fit perfect, and it all checked out alright! It really was what they said "BOLT ON". Some of you already know how ANAL i was about asymmetry of some xhaust system.
CONSTRUCTION: 10/10 very solid construction. It's not one of those cheaply constructed exhaust system. Good overall thickness to the piping, clean weld. It has very solid feel to it.
SOUND Quality: 10/10. It's still burning composites inside. BUT it sounds amazing. When you fire it up, it produces very deep tone. It pops and crackles from time to time when it decelerates(which I like

). NO HISS. ZERO HISS.. Well I can't really say anything yet cuz my HFC JUST left the port. There should be a follow up on this part with HFC installed in a bout 2weeks. and then sadly my baby will be parked during my vacation..
SOUND-dB level: If you consider stock exhaust as 1/10 and Muffler delete as 10/10, this thing sits somewhere around 6~7. It's not a quiet exhaust system for sure. However, it does not have exhaust noise while idling or cruise. Only when you step on the gas and give it a "GO". I'm a bit worried on this department when I install HFC.. we shall see. Nonetheless, No drone from the exhaust other than below 2000rpm range. dB level inside is def. louder but it does not bring up to a point where it's hard to converse with passenger.

Overall, very pleasant exhaust. I will follow it up with video with more accurate representation of sound level from inside. The video the company posted is not really an accurate representation as it seems to make this exhaust sound like a monstrous addition to the Z..

Videos and dyno result to follow.

04-09-2010, 08:03 PM	#1 (permalink)
sinceday1 Track Member Join Date: Oct 2009 Location: Canada Posts: 514 Drives: 09 Nissan 370Z M6 Rep Power: 17	Agency Power Exhaust Install & Review I've been searching for the exhaust system that will give a good deep tone, loud but not obnoxious, nor raspy. Some of my choices included F.I / ARK / HKS. When I was about to pull the trigger on ARK exhaust, Agency Power came out with their exhaust system and I decided to give it a go.. 1. F.I: Although I love how they look, sound, and other whole nine yards, I simply could not wait 6 weeks for the system. My vacation plans and other would have been sacrificed in order to receive the product. Also, another factor that pulled me away was clearance issue. Many have confirmed that it's not too much of an issue when it is driven with care and etc, I didn't want to think about exhaust hitting bumps or anything like that (Roads where I live is quite CRAPPY) 2. ARK: Same deal. love how they look, sound .. BUT only thing that diverted me was how low the exhaust sit. also there seems to be quite noticeable muffler hang difference on left and right.. I know It's hard to notice, but knowing that they sit differently, I'm going to constantly look and tell myself I didn't spend 600 more and get HKS... 3. HKS: PRICE! AND SOUND...... Including shipping and tax, it would've been over 2k for just for an exhaust system. Maybe when I graduate from law school and have enough $$ floating around to dump 2k on the exhaust ..maybe. Sound wasn't something I was looking for either. OK So.. The reason I decided on Agency Power was that it didn't have all the negatives I listed on other exhaust system (It's subjective i know..) BUT with all the sound, albeit short of performance on their Dyno. In wilful blindness, I told myself that they needed to be re-dynoed. their baseline dyno didn't even compare close to other company's claimed HP Baseline to start with. I'll find out how exactly the exhaust will perform when I put it on a dyno. (SADLY I DONT HAVE BASELINE....) I'm not even gonna mention butt dyno.. Well I DO FEEL the difference but dat's also subjective. FITMENT: 9.5/10. Exhaust fits very nicely. There was a MINOR adjustment that needed to be done in order to level the "MUFFLER". Tip aligned without any adjustment. Flanges and gaskets fit perfect, and it all checked out alright! It really was what they said "BOLT ON". Some of you already know how ANAL i was about asymmetry of some xhaust system. CONSTRUCTION: 10/10 very solid construction. It's not one of those cheaply constructed exhaust system. Good overall thickness to the piping, clean weld. It has very solid feel to it. SOUND Quality: 10/10. It's still burning composites inside. BUT it sounds amazing. When you fire it up, it produces very deep tone. It pops and crackles from time to time when it decelerates(which I like ). NO HISS. ZERO HISS.. Well I can't really say anything yet cuz my HFC JUST left the port. There should be a follow up on this part with HFC installed in a bout 2weeks. and then sadly my baby will be parked during my vacation.. SOUND-dB level: If you consider stock exhaust as 1/10 and Muffler delete as 10/10, this thing sits somewhere around 6~7. It's not a quiet exhaust system for sure. However, it does not have exhaust noise while idling or cruise. Only when you step on the gas and give it a "GO". I'm a bit worried on this department when I install HFC.. we shall see. Nonetheless, No drone from the exhaust other than below 2000rpm range. dB level inside is def. louder but it does not bring up to a point where it's hard to converse with passenger. Overall, very pleasant exhaust. I will follow it up with video with more accurate representation of sound level from inside. The video the company posted is not really an accurate representation as it seems to make this exhaust sound like a monstrous addition to the Z.. Videos and dyno result to follow. Last edited by sinceday1; 04-09-2010 at 08:08 PM.