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718 GTS 4.0/GT4/GT4RS/Spyder/25th Anniversary Discussions about the 718 version of the GT4RS, GTS 4.0, GT4, Spyder and 25th Anniversary Boxster
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Kline 718 GT4/Spyder exhaust

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Old 07-22-2024 | 10:51 PM
  #2506  
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Originally Posted by Bill_76
I had 718 Spyder with Kline and now Spyder RS in break in process, system is no compatible, and the Spyder RS engine and intake sound is far better than Kline exhaust sound in a regular Spyder. it does not mean a Kline in a RS will not make difference but you can be happy with the stock interior sound; in my previous Spyder it was a must, I installed it with 400 miles during break-in, I cannot live with the tone from factory.
Thank you. Will ride it out to see if I get that RS before end of production. if not then I'll go for the Kline for my GTS.
Old 07-24-2024 | 09:44 AM
  #2507  
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If I wanted to replace the gaskets before putting a used system on, does anybody have a list of the part numbers/quantities they could post?
OAP's and back box.
Thx
Old 07-24-2024 | 10:49 AM
  #2508  
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Originally Posted by midcont
If I wanted to replace the gaskets before putting a used system on, does anybody have a list of the part numbers/quantities they could post?
OAP's and back box.
Thx
https://rennlist.com/forums/718-gts-...asket-p-n.html

Old 07-24-2024 | 11:20 AM
  #2509  
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I know the stock OAP gaskets will work, but I believe the back box gaskets are proprietary to kline's.
Old 07-24-2024 | 11:22 AM
  #2510  
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Originally Posted by TRSCobra
I know the stock OAP gaskets will work, but I believe the back box gaskets are proprietary to kline's.
When I talked to Eric at Supreme, he said the stock back box gaskets work. I haven't tested that myself yet.
Old 07-24-2024 | 11:24 AM
  #2511  
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Originally Posted by Josh_357
When I talked to Eric at Supreme, he said the stock back box gaskets work. I haven't tested that myself yet.
Reached out to Kline and they are sending me a free set of gaskets even though its a used system...I just pay for the postage. Great customer service.
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Old 07-24-2024 | 11:32 AM
  #2512  
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Originally Posted by Josh_357
When I talked to Eric at Supreme, he said the stock back box gaskets work. I haven't tested that myself yet.
Good to know! Makes me wonder if the v band adapter that comes off the Dundon header rear mount catted OAP's would flip and mate up with the kline back box...
Old 07-24-2024 | 12:58 PM
  #2513  
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Originally Posted by TRSCobra
Good to know! Makes me wonder if the v band adapter that comes off the Dundon header rear mount catted OAP's would flip and mate up with the kline back box...
@TRSCobra The Dundon adapter may bolt to a Kline muffler but there will be a mismatch in pipe sizes. I think @G-forceGT4 was considering this option. Maybe he will chime in with more information.


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Old 07-24-2024 | 01:01 PM
  #2514  
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Originally Posted by LooseNut
@TRSCobra The Dundon adapter may bolt to a Kline muffler but there will be a mismatch in pipe sizes. I think @G-forceGT4 was considering this option. Maybe he will chime in with more information.

Oh yeah even if the angle did work, that configuration would be much less ideal for best flow.
Old 07-24-2024 | 01:25 PM
  #2515  
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Originally Posted by TRSCobra
Good to know! Makes me wonder if the v band adapter that comes off the Dundon header rear mount catted OAP's would flip and mate up with the kline back box...
It would not, well it could bolt on if the flange is in the same exact location in space. However, the flow path would not be optimal. The top pipe is the quiet path stock and Dundon, the top pipe is loud open path on Kline. I've considered a custom adapter should I go Dundon route in the future, but afraid of drone coming back.

A Kline adapter like this would be needed for the Dundon header.


Last edited by Josh_357; 07-24-2024 at 01:33 PM.
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Old 07-24-2024 | 03:11 PM
  #2516  
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Originally Posted by Josh_357
It would not, well it could bolt on if the flange is in the same exact location in space. However, the flow path would not be optimal. The top pipe is the quiet path stock and Dundon, the top pipe is loud open path on Kline. I've considered a custom adapter should I go Dundon route in the future, but afraid of drone coming back.

A Kline adapter like this would be needed for the Dundon header.
If making one custom, a helmholtz tube may be able to be fitted to the side of the adapter if there was clearance in that area under the car. Would likely produce the best sound ever heard lol
Old 07-24-2024 | 03:15 PM
  #2517  
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Originally Posted by TRSCobra
If making one custom, a helmholtz tube may be able to be fitted to the side of the adapter if there was clearance in that area under the car. Would likely produce the best sound ever heard lol
True, my issue is time and money. I want to stop modding and developing parts, and just drive more. A custom Dundon/Kline marriage would not be cheap either. They one can daydream while stuck in boring meetings
Old 07-24-2024 | 03:19 PM
  #2518  
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Originally Posted by Josh_357
True, my issue is time and money. I want to stop modding and developing parts, and just drive more. A custom Dundon/Kline marriage would not be cheap either. They one can daydream while stuck in boring meetings
I'm sure it would take a ton of test fitting and trial and error to dial out the drone frequency. And even then the ROI would likely never happen!
Old 08-08-2024 | 01:36 AM
  #2519  
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For anyone interested, I have a Kline stainless steel OAP and rear section that has been on my GT4 less than 4K miles that I am looking to sell. Will post in marketplace soon, but PM me if you are interested.
Old 08-09-2024 | 02:03 PM
  #2520  
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Went ahead and listed it on marketplace.

https://rennlist.com/forums/market/1424361


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