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Message: <blockquote data-quote="Mr Jones 4.6" data-source="post: 514703" data-attributes="member: 9622"><p>When it comes to making numbers you will really just have to see what your car makes and go from there. I would assume your car is going to make around 250 rwhp probably. Whoever told you about the air/fuel ratio is completely wrong. Those mods that you are not going to throw off your a/f ratio that bad, the stock tune has some flexibility to it so your not going to throw it off that much. I ran with those mods on my car plus gears for over 2 years and never had a problem. Most the time if you have a chip or a programmer to put the car on the dyno, tune it and put the tune on your chip/prog. run about $300-400.</p></blockquote><p></p>