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Discussion Starter #1
In the next few days, I am getting a custom-made 4" catback piping done. Also, I am throwing on a high-flow Magnaflow muffler... but my question is....

Do I have to buy a mid-pipe or is it possible to have the Midpipe custom made in greater diameter piping @ a Muffler shop??? (4" inches to be exact.... ) Any insight into this would be great, thanks.... 8)
 

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Discussion Starter #2
APEXi Exhaust & 3" custom piping!!!

Decided not to proceed with having a custom-made midpipe done because I do not want to mess with the sensors that are attached at the top.
 
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