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iwas thinking of removing the cat. converter just thinking that it needs a little more sound and i'm hoping that might result in a small hourespower gain as well please post back asap
 

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I doubt that it would be a good idea as the engines computer probably would freak(but still run). What some people have done instead is remove the resonator. There are posts about it on here.

http://www.fordfusionclub.com/index.php?topic=60309.0
http://www.fordfusionclub.com/index.php?topic=65097.0

There are more but no offense you could do the research yourself, might give you some ideas on what you can do on the fusion.

I myself was thinking about removing the muffler, but I'm not sure right now. Worse the would happen is cut the muffler off, drive it, hate it and weld back on. only thing it would cost me is the gas to go up to my uncles. He's on vacation right now anyway. :(
 

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Its loud, illegal in most areas, and wont give you squat for a gain if you dont have a good headback exhaust, and possibly a tune.
 

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It's illegal everywhere [think Federal Law] unless the vehicle is not "road-worthy", ie a track car or funny car. Deleting the cat will increase HP at the loss of Torque. You can get an O2 sensor "trick" harness where the ECU thinks the cat is installed and working fine, and they are about $50. With this harness, you will pass an OBDII scanner-type of emissions test but obviously fail a visual inspection. The car will run fine. As Crystallas said, it will be significantly louder. Best gains will be had with an entire high-flow aftermarket exhaust and a tune. You gain very minimal Hp with this mod only. Best idea is to buy a Random Technologies universal high-flow cat (to keep it legal) and the magnaflow exhaust.
 
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