GT500SOMEDAY

Check out this head to head video I found on youtube. I have never seen this type of comparison before, actually one that is measured with real equipment.

I'm very pleased with the outcome of the test

1 Alibi 2

Stock GT350R vs a SAI S/S conversion !
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And the " real equipment " is a sound level meter, available @ Radio Shack..
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GT500SOMEDAY

I thought radio shack went bankrupt.... I'd bet you could find something like this meter on the APP Store for your smart phone

Dino Dino Bambino

Who gives a rat's **** which one is louder? For me, it's the car that plasters the biggest, cheesiest grin on my face when I drive it that's the winner.

danzcool

^ This.
Besides you can make any car louder with an exhaust kit, you need look no further than a Honda with a fart can for that.
Heck, the last go around I ended up changing up my exhaust to make my car quieter, don't want to attract unwanted attention from the officers.

Dino Dino Bambino

Having a 120+dB exhaust won''t just attract unwanted attention from the boys in blue, but your neighbors will also hate you and eventually you'll go deaf (if you aren't already). The only upside is that the crowd will love you at car shows.
Most performance cars max out at around 95dB and that's really the upper limit of being acceptable on a street driven car..