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S Chassis Technical discussion related to the S Chassis such as the S12, S13, S14, and S15. |
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10-29-2014, 04:28 PM | #1 |
Cat/Muffler Question
I'm trying to figure out if I get a CAT at 3" inlet and 2.5" outlet to 2.5" muffler, would that be "depriving" the SR? I read that the 3" muffler would be the best for SRs and it would create less back pressure. Or would it be ok for me to go 3" inlet to 2.5" outlet to 2.5" muffler?
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10-29-2014, 08:41 PM | #2 |
Join Date: Oct 2014
Location: Osaka, Japan
Age: 39
Posts: 16
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When i bought my S13 the guy had it setup that exact way with the silencer on. It also had a custom catalytic converter welded on the exhaust. It ran like crap and idled high. You could feel the back pressure and surge. I ripped that stuff off the next week and replaced it with a 3" catback exaust all the way. No catalytic converter. My SR now idles perfect around 800 rpms and a lot more responsive. I'd go with the 3" all the way if i were you. It made mine run a hell of a lot better and sounds beautiful.
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