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Ok I am new to exhaust systems and dont really know alot of what I need. I have a 2007 ls 2.2l cobalt with a K&N cold air intake. And that gives a nice sound already but I just want to increase my HP alittle bit and make it just alittle louder and not make it sound so loud people are always looking or sound like a ricer. I dont know what I all need like a muffler? pipe? I have no idea please explain to me and help me pick one. I know i want Catback but thats it. Thanks
 

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Check Engine Mods thread plenty of info there of all sorts. Of "sound" "performance" "quality" "fitment" "durability"
 
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