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do you think if i get this setup it will be really loud. no cat 2 1/4 pipe to dynomax super turbo muffler and 2 1/4 tail out stock local. would 2 1/4 exhaust make it louder than 2in?
Think about it all math like...the larger diameter pipe is going to result in a longer wavelength natural frequency, thus giving the exhaust a deeper tone, but note that that natural frequency is going to be created right in the 2500 RPM range. This of course means that larger pipe is going to = more highway cruising drone at a lower frequency. I had 3 inch pipes on a dual 40 series turned down under the cab on my 4cyl Tacoma...it just gave me headaches and made me dizzy on long rides.
I am not disagreeing with you, but please explain your "math" a bit more. Are you saying that larger pipes result in a longer wavelength that create natural, or resonant, frequencies at a lower (cruising) or higher rpm? I would suspect that having a 40 series Flowmaster was a significant part of the noise. Flowmasters are designed more to create a particular sound than to muffle the engine noise.
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