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Electric Cutout Exhaust

exhaust Electric Cutout V6

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2 replies to this topic

#1 FirebirdZach

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  • Engine: V6
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Posted 14 January 2021 - 07:09 AM

So I have a 1999 firebird v6 and I wanted to have an electric Cutout for the exhaust so it will be louder but now always loud. Im not too good at it but I like to learn as it a great way to, I was planning hopefully to get the cutout between the cats and resonator so it would be a technical straight pipe without removing the resonators and mufflers totally but I dont know if that would be possible, Please and Thank you.



#2 Injuneer

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Posted 14 January 2021 - 10:00 AM

So I have a 1999 firebird v6 and I wanted to have an electric Cutout for the exhaust so it will be louder but now always loud. Im not too good at it but I like to learn as it a great way to, I was planning hopefully to get the cutout between the cats and resonator so it would be a technical straight pipe without removing the resonators and mufflers totally but I dont know if that would be possible, Please and Thank you.

 

Just to get both of us on the same page, the 1999 factory service manual shows your 1999 3.8L V6 has a single catalytic converter.  The left and right side exhaust manifolds dump into a Y-pipe that connects to the single cat.  Unless your exhaust has been modified, it should look like that.   

 

Right after the cat is an S-pipe that shifts the exhaust to the center driveshaft tunnel.   An intermediate pipe connects the S-pipe to the single cross-flow muffler behind the rear axle.  There is no resonator(s) shown in the factory service manual.  The cutout would be located in the intermediate pipe.  You would have to measure the diameter of the pipe to determine the size cutout required.  Or maybe one of our V6 owners could advise.

 

You will get "louder", but locating the cutout this far back in the system is not going to contribute much to performance.

 

What additional information do you require?

 

Free download of the 1999 FSM, courtesy of GaryDoug:

 

http://www.mediafire.../?40mfgeoe4ctti


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FRED

 
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#3 FirebirdZach

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  • Engine: V6
  • Transmission: 4 Speed Automatic

Posted 17 January 2021 - 09:23 PM

 

Just to get both of us on the same page, the 1999 factory service manual shows your 1999 3.8L V6 has a single catalytic converter.  The left and right side exhaust manifolds dump into a Y-pipe that connects to the single cat.  Unless your exhaust has been modified, it should look like that.   

 

Right after the cat is an S-pipe that shifts the exhaust to the center driveshaft tunnel.   An intermediate pipe connects the S-pipe to the single cross-flow muffler behind the rear axle.  There is no resonator(s) shown in the factory service manual.  The cutout would be located in the intermediate pipe.  You would have to measure the diameter of the pipe to determine the size cutout required.  Or maybe one of our V6 owners could advise.

 

You will get "louder", but locating the cutout this far back in the system is not going to contribute much to performance.

 

What additional information do you require?

 

Free download of the 1999 FSM, courtesy of GaryDoug:

 

http://www.mediafire.../?40mfgeoe4ctti

So im just editing this comment because I got better information I have a magnaflow catback exhaust on the car with a 2.5 diameter so would it be possible to just straight from the cat have the cutout or should I not do that. On a side note will the cutout improve performance or will it not change anything. I also want to thanks you for your help.


Edited by FirebirdZach, 17 January 2021 - 09:44 PM.






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