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outta curiosity...
1- why is it called a dumb pipe? thats an abbreviation for something right?
2- won't a dump pipe do as much damage to the environment as no cat would? if not.. the why not?
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FS: 92 Coupe w/ AT and 118K miles, Red
WB: 91-93 HB w/ MT and <140k miles, any color
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