Hi: so now i know how to do my exaust on my 5.0 fuel injected mercury (260) hp. I was wondering if there is anyway to make some more horsepower with out hving to pull the engin apart. cars can be chiped. I would like 100 hp more but maybe thats asking to much? But getting anymore at all would be great can somone stear me the right direction? thanks you have all be great!
