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I bought on Ebay a used exhaust upgrade that I've seen on line for about $3000.   The  price was $600 delivered so I thought, great.  After installing the system  ( headers, catalytic converters, plus mufflers with 2 nice round tail pipes) I was very disappointed with the sound.  At higher reves it sounds fine but at normal operation it's more like a bad muffler.  I was going to re-install the he old boring muffler and header but I thought maybe someone out there may have a suggestion for a fix for the new system.

This was installed on my 1997 Boxster.

Thanks

mike Lioce

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1 hour ago, michael lioce said:

 


I bought on Ebay a used exhaust upgrade that I've seen on line for about $3000.   The  price was $600 delivered so I thought, great.  After installing the system  ( headers, catalytic converters, plus mufflers with 2 nice round tail pipes) I was very disappointed with the sound.  At higher reves it sounds fine but at normal operation it's more like a bad muffler.  I was going to re-install the he old boring muffler and header but I thought maybe someone out there may have a suggestion for a fix for the new system.

This was installed on my 1997 Boxster.

Thanks

mike Lioce

 

A belated welcome to RennTech :welcomeani:

While I hate to say this, you have just joined a lot of other people that discovered the exact same thing: Nearly every aftermarket exhaust system ever made for the 986 has droning issues.  Perhaps even worse, before and after dyno sessions have repeatedly also shown that most of these system do not add any measurable level of performance, and some actually lose horse power.  All they consistently do is make noise................

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  • 2 weeks later...

Here's why it drones.

 

Unlike most cars that have their exhaust systems attached by hangers mounted to the under body, the Boxster exhaust system is mounted to the transmission ... which is mounted to the engine.

 

The engine and transmission mounts are "tuned" to the weight of the engine/transmission/muffler package and when you reduce that weight by fitting a lighter (they are always lighter because they are cheaper) aftermarket exhaust, you have made the system out of tune and the drone is the result.  There are actually aftermarket systems that do weigh the required amount.

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