Performance programming or chip?
Greetings Enthusiasts! I'm new here and have been searching, but can't find any info on plug and play horsepower. I like to add about 50 hp or so to my 99 Marquis. I've looked at Bully Dog performance tuners, but am afraid to spend $400 for a machine that might not even give me 10 more horses. I know the 4.6 is capable of much much more than the stock 200hp.