Intake & Exhaust Questions and info regarding various aftermatket exhaust systems for the G35 (Headers,Y-Pipes, and Cat-Back Systems)

2.5" & 3" Piping Difference -- Help needed!

  #1  
Old 08-06-2015, 10:45 AM
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2.5" & 3" Piping Difference -- Help needed!

So I have been looking into the TopSpeed Pro1 Exhaust, but I have found two different setups. One is a HKS Replica Catback Dual exhaust with 2.5" piping and 4.5" tips, and the other is a Catback Setup with a Mid Resonator that has 3" piping and I believe 4" tips.

I am confused here in the sense that some say the 3" piping will decrease low RPM power for a NA G35 Coupe, but will be louder.

I am wanting a louder exhaust, and could care less about HP gains honestly from an exhaust system, but do not want to lose power or HP along the way somehow. I do not know too much about all of this as I am new to the exhaust world -- all I know is I do not want to modify my stock exhaust.

So what is the best way to go here for a louder exhaust without power loss? 2.5" or 3" piping?

Thank you all for the help!
 
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Old 08-07-2015, 02:56 PM
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Originally Posted by Cam_Cooper3 View Post
So I have been looking into the TopSpeed Pro1 Exhaust, but I have found two different setups. One is a HKS Replica Catback Dual exhaust with 2.5" piping and 4.5" tips, and the other is a Catback Setup with a Mid Resonator that has 3" piping and I believe 4" tips.

I am confused here in the sense that some say the 3" piping will decrease low RPM power for a NA G35 Coupe, but will be louder.

I am wanting a louder exhaust, and could care less about HP gains honestly from an exhaust system, but do not want to lose power or HP along the way somehow. I do not know too much about all of this as I am new to the exhaust world -- all I know is I do not want to modify my stock exhaust.

So what is the best way to go here for a louder exhaust without power loss? 2.5" or 3" piping?

Thank you all for the help!
This should fit your needs.


Or do something along the lines of that, like bring it to an exhaust shop and have them weld a muffler on it. BINGO
 
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Old 08-07-2015, 08:49 PM
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I would go w/ Motordyne. Tony did his research when making this exhaust.
 
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Old 08-10-2015, 12:16 PM
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This will help even more for engine performance:

<div class="freq-embed" style="width:640px;color:#666;font-family:'Helvetica Neue',Helvetica,Arial;font-weight:bold;font-size:640px;"><div><iframe src="https://www.facebook.com/video/embed?video_id=582791968470699" width="640" height="388" frameborder="0"></iframe></div><div style="text-align:right;font-size:0.02em;margin-top:3px;">Watch more video from the <a style="color:#0095DD;text-decoration:none;" href="http://www.frequency.com/top">Staff Picks</a> channel on <a style="color:#0095DD;text-decoration:none;" href="http://www.frequency.com">Frequency</a></div></div>
 
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Old 08-10-2015, 01:08 PM
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Originally Posted by yosip1115 View Post
This should fit your needs.

Drilled holes in muffler - YouTube

Or do something along the lines of that, like bring it to an exhaust shop and have them weld a muffler on it. BINGO
I am ashamed to say that when I was 16 I did this. I was cool until it came time for inspection.
 
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Old 08-10-2015, 01:09 PM
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Good advice here^^
 
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Old 08-10-2015, 04:15 PM
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Loooool is that your youtube tex?
 
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Old 08-10-2015, 04:57 PM
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Originally Posted by yosip1115 View Post
This should fit your needs.

Drilled holes in muffler - YouTube

Or do something along the lines of that, like bring it to an exhaust shop and have them weld a muffler on it. BINGO
Omg, this is so funny. That thing seriously sounds like shreks butthole after a night of taco bell.
 
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Old 08-10-2015, 07:04 PM
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Originally Posted by yosip1115 View Post
Loooool is that your youtube tex?
No, that was back in 197o there was no YouTube back then .
 
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