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GM Performance Exhaust/Borla

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Old Jan 25, 2009 | 01:25 PM
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Default GM Performance Exhaust/Borla

What is the estimated additional horsepower drawn from installing a GM performance off-road exhaust or a Borla Stinger which I believe to me the same?
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Old Jan 25, 2009 | 02:30 PM
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At the most about five. Do cat-back exhaust for the sound and looks not for power. there have been many Dyno comparisons here and five HP is about it.
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Old Jan 25, 2009 | 02:58 PM
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Originally Posted by cmonkey713
At the most about five. Do cat-back exhaust for the sound and looks not for power. there have been many Dyno comparisons here and five HP is about it.
Go with long tube headers for better sound than stock as well as a healthy bump in HP/TQ.
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Old Jan 25, 2009 | 04:07 PM
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Originally Posted by cmonkey713
Do cat-back exhaust for the sound and looks not for power.
Definitely do it for sound...I love the way my GM/Borla unit sounds...amazing.

This weekend, I got to hear it from outside the car for the first time...my buddy did a couple fly-by's while I stood at the end of my street...seriously sweet music.
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Old Jan 28, 2009 | 01:14 AM
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I have the GM performance touring exhaust. This one is very quiet in my opinion, mellow and quiet inside the car. I heard that it gained 15hp to the crank which isnt much to the rear. One thing I dont like is the bends in the pipe of the system, it reminds me of the C5 setup.
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Old Jan 28, 2009 | 05:55 PM
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Borla manufactures the GM system to GM specs which is quieter than a true Borla system. If you are expecting a true Borla sound, you won't get it from this.
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