Quote:
Originally Posted by SimonSellsAustin
A stock system isn't worth the money and install for maybe .5mpgs.
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The stock system might be worth more than .5 mpg if the back pressure is so little that the engine is dogging just to get up to speed. Also, putting a cat back into that thing will help emissions, smog, etc. I'm not sure how it is where the OP lives, but in California, the seller must ensure that the vehicle pass smog at time of sale.