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check out streetkiaz.com I hear it helps with everything, especially gas milage. YOu should reset your ecu beforehand though. YOu'll get a CEL (Check engine light) cause your gettin rid of the pre-cat on the stock manifold, you should extend the wires down infront of the other cat but the car will run more then fine with that cel it'll just be annoying thats all. Also check out kfxperformance.com if you haven't already.
 

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2004 Kia Rio 2011 Kia Sorento LX V6 AWD
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806 Posts
A header with a 2" header back exhaust would do alot for performance.. Stock my car 83 hp at the wheels with exhaust and header (and a little cam moding) I now make 96.4 hp so that's 13 whp on it's own.. No CAI.. The only thing to keep in mind is do not over do the pipe sizing.. I went 2.25 and people will argue to the death that it is to big and that 2 " is ideal but no one has dyno'd a Rio with the same mods as mine with a 2" exhaust to prove me other wise.. The larger pipe size you go the more top end power you'll see but torque will drop off like crazy..

Dan
 

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2015 Buick Verano "Leather Group", 2015 Kia Optima Hybrid
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6,063 Posts
lets see those dynos....

also go over to streetkiaz to hear whinning and moaning and arguing every day... its a constant argument over there about tids and tats. my cars better, oh my cars faster, your car sucks, what you bought sucks. just some things you see every day there...

4 years back streetkiaz rocked but since ten all down hill..
 

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2015 Buick Verano "Leather Group", 2015 Kia Optima Hybrid
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6,063 Posts
dont take offence id juust like to see the results...
 

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2004 Kia Rio 2011 Kia Sorento LX V6 AWD
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806 Posts

Here the dyno chart my first pull made 109.56 ft/lbs I'm not sure why probally just a mix up but that's the blue squigle on the second chart.. Other then that 96.76HP 94.13 Ft/lbs

Dan
 
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