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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 06-21-2014, 05:56 PM   #1
GONIF

 
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whats the real deal with Granitelli cat back

So I see that there is a great deal with the Granitelli cat back now on another forum .
But I wonder how they rate ? And they claim " Adds significant horsepower while improving mileage and throttle response"
I have been holding off installing my SP headers with HF cats until just B4 I get it tuned, don't want to run too long without a tune with long tubes . And I don't want to get it tuned until I'm sure I won't need a warrentee , and the recalls are over.
any one have Granitelli sport cat back with long tubs ? Is it too loud ? Can they back up their claim ?
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Old 06-21-2014, 06:10 PM   #2
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In my honest opinion look into another exhaust system. Just my 2 cents bud.
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Old 06-21-2014, 06:14 PM   #3
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I don't think there is a cat-back out there that will increase power. About all they do is change the tone, etc
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Old 06-21-2014, 06:25 PM   #4
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Quote:
Originally Posted by blake-b View Post
I don't think there is a cat-back out there that will increase power. About all they do is change the tone, etc
I would need to see proof on a dyno to believe the claim also .
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Old 06-21-2014, 06:29 PM   #5
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There is also a reason granatelli isn't a site sponsor anymore
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Old 06-21-2014, 08:55 PM   #6
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Spark plug wires that add 10+whp, new Granetelli Maf that adds HP, and a catback that adds significant HP. You tell me.
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Old 06-22-2014, 12:32 PM   #7
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Their rear rotors added HP to my car , they did save me some coin though and work well enough, I have EBC's up front that look identical. No axle back is going to make power, period. Our restriction is way, way upstream. You would be desperate to find a cat back that makes HP, sure you could find some that take it though. There is also more than one reason not to be a sponsor on here, a lot of good LS (other forum) guys shy away form here thanks to spaghetti's and others miss information and fan boy bashing's.
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Old 06-22-2014, 10:32 PM   #8
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Catback can add hp, but never more than 4-5hp for our stock cars. You could lose hp with some crappy system lol.
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