Im currently running the Racing Beat Header with Racing Beat DR midpipe and SR motorsports catback... love the sound. about the switch to RE Amemiya cat back. I was running Racing beat header with Racing Beat Race pipe with SR cat back and it was super loud but a little raspy.. I just use the stock O2 sensors. Havnt had a cat on my 8 with in 3 years
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2005 Mazda RX-8 Velocity Red Mica - Daily Driver
2004 Mazda RX-8 Titanium Gray Metallic - RIP
1997 Mitshibishi Eclipse GST Black -Sold- RIP
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