Quote:
Originally Posted by Alain V.
The ECU is stock, but I do have hotter thermostat than stoc (298 if I remember right) a Riff Raff over size air filter set up and a 3 inch down pipe w/4 inch exhaust-no kitty cat- and one muffler (to keep my wife happy).
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Why is that? Does it really do anything? I changed mine to the hotter one and it didn't really make any difference. Also why a 3 in down pipe with a 4 in exhaust? Why leave the restriction there? Why not 4 all the way? 
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