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What is it?
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09-07-2022, 05:47 PM
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RanRich
Enthusiast Member
Join Date: Mar 2015
Location: St. Louis
Posts: 425
Drives: 09 PG Sport M6
Rep Power:
3372
"Frequency Intelligent" Valvetronic. It uses a Y-pipe merge as opposed to an H or X pipe:
https://www.fi-exhaust.com/web/produ...M1633426550486
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