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i thought there are 4 in the front. i dont know how many are in the back though.

Thanks. Im just not sure if its worth 200$ for 02 sensors. How hard is it to change them anyways??

Hello. i have a 1998 Mark VIII with 113,000 miles on it. I only drive around the city and i average out to 11-13mpg every time. i don't just rely on the dash, i do the math. Ive done fuel filter, air filter, and spark plugs. i put the high octane fuel in too, to get better gas mileage. My last...

Thanks guys. I would I just don't want a ticket. I'm in az. Do you Think the third cat gets rid of the dual exhaust. Should I keep it split and put two more cats on it?? Would it make it perform better. I Think the 3rd cat Where the dual exhaust meets defeats the point of a dual exhaust. Thanks.

Im debating on either choosing cherry bomb glass packs or a flowmaster muffler. I want my 98 Mark VIII LSC to sound like a muscle car. I want it pretty loud. Enough so kids at my school can see a badass senior roll up it a gorgeous car. I have stock exhaust on it. Any help please...