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LSJ LTH, Catless DP Muffler Delete?

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Old 05-14-2015, 12:26 AM
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LSJ LTH, Catless DP Muffler Delete?
Is this a thing? Or just a retarded thing?
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Old 05-14-2015, 07:58 AM
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Retarded thing
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Old 05-14-2015, 10:21 AM
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retarded loud and buzz city
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Old 05-14-2015, 10:29 AM
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Muffler delete on an LSJ (unless turbo) sounds like poo.

Catless with a quality catback sounds good (my car to be exact)
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Old 05-14-2015, 09:50 PM
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I just went LTH with Catless DP from OTTP. I have stock catback and OMG the rasp is paaaaainnnnfuuuul. I am looking for a fix right away. I even parked my SS at the mechanics and am driving a friends car because I am so embarrassed to drive the damn thing. I was thinking of either 2.5" ZZP catback or 3" ZZP catback.

What are you running?
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Old 05-15-2015, 07:12 AM
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Originally Posted by BlackBriar
I just went LTH with Catless DP from OTTP. I have stock catback and OMG the rasp is paaaaainnnnfuuuul. I am looking for a fix right away. I even parked my SS at the mechanics and am driving a friends car because I am so embarrassed to drive the damn thing. I was thinking of either 2.5" ZZP catback or 3" ZZP catback.

What are you running?
Ported GMPP manifold, ZZP 3" catless downpipe, Corsa Touring Catback. Supports 299.45whp & 242wtq with no problem.

The stock catback does get raspy with a catless/header setup.
Last edited by Staged07SS; 05-18-2015 at 07:10 AM.
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Old 05-16-2015, 02:53 PM
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Stock exhaust mani 2.5 catless DP stock catback made 312/311. Lol
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Old 05-16-2015, 05:24 PM
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Originally Posted by Tjolley
Stock exhaust mani 2.5 catless DP stock catback made 312/311. Lol
^^^ This is why I never had any issues running the GMPP exhaust, with a good catless DP the exhaust flows plenty for a blower car.
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Old 05-18-2015, 07:10 AM
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Originally Posted by ItalianJoe1
^^^ This is why I never had any issues running the GMPP exhaust, with a good catless DP the exhaust flows plenty for a blower car.
Yup!! Agreed.

Originally Posted by Tjolley
Stock exhaust mani 2.5 catless DP stock catback made 312/311. Lol
Spray numbers
Last edited by Staged07SS; 05-18-2015 at 09:57 AM.
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Old 05-20-2015, 07:14 PM
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stock manifold good to 350hp
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Old 05-21-2015, 07:15 AM
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Originally Posted by mrbelvedere
stock manifold good to 350hp
This guy speaks the truth!
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Old 05-21-2015, 10:38 AM
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I know I definitely sprayed my way to 350hp on it... Car pulled like crazy all the way to 7600.
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Old 05-21-2015, 10:53 AM
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Originally Posted by ItalianJoe1
I know I definitely sprayed my way to 350hp on it... Car pulled like crazy all the way to 7600.
I can attest to this as well. My car pulls strong all the way up to 7750 rpm.

My torque curve also shows my ported gmpp manifold doesnt choke off power up top.
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