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Old Mar 9, 2024 | 04:23 PM
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I have a 2011 GS 6-speed . I'm going to install Kooks 1 3/4 headers and catted x pipe. Before I get it tuned, is an air intake necessary? From what I have read on this forum, the stock air filter will handle 600 hp.
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Old Mar 9, 2024 | 04:24 PM
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Nothing is necessary. You can just throw on the headers and be perfectly fine
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Old Mar 9, 2024 | 04:53 PM
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I am trying to get a real cost on adding headers to my car. A reputable company near me has a header package I'm looking into. Halltech air intake, headers, mighty mouse catch can , NGK TR55 spark plugs , fluids , baseline tune, full street dyno tune , 160 THERMOSTAT.
Trying to cut cost with the air intake.
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Old Mar 9, 2024 | 04:59 PM
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Do I need heat insulation for the torque tunnel, spark plug wires, starter?
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Old Mar 9, 2024 | 05:16 PM
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Originally Posted by shutout
Do I need heat insulation for the torque tunnel, spark plug wires, starter?
Again, you don’t NEED anything.
I would suggest plug wire insulators though and some insulation on the starter for peace of mind.
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Old Mar 9, 2024 | 05:20 PM
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Thanks for the information.
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Old Mar 9, 2024 | 06:31 PM
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Originally Posted by shutout
Thanks for the information.

My pleasure and good luck. Don’t overthink it. It’s just headers
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Old Mar 9, 2024 | 06:42 PM
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I need that mentality. Oh, you're going to need a starter heat shield, a tunnel heat shield or your interior will get to 500 degrees. Spark plug shield or your wires will melt. 2000 degrees under your hood. Yours clutch will melt.
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Old Mar 10, 2024 | 04:24 AM
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Skip the Kooks and go with the 2" Speed Engineering....they fit great
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Old Mar 10, 2024 | 04:28 AM
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I would think about any other mods you might wanna do such as a cam, dyno tunes are spendy around me (~$800) so it’s good to do fewer of them
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Old Mar 10, 2024 | 08:46 AM
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Originally Posted by Ben34
I would think about any other mods you might wanna do such as a cam, dyno tunes are spendy around me (~$800) so it’s good to do fewer of them

or just not tune now because he is just doing exhaust work. Every single day someone mentions headers, tunes come up. It is my biggest pet leave that people think they need tunes for headers
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Old Mar 10, 2024 | 09:10 AM
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The reason I 'm leaning towards Kooks is for the fitment. From what I have read on this forum, Kooks fit the best.
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Old Mar 10, 2024 | 10:21 AM
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Originally Posted by shutout
The reason I 'm leaning towards Kooks is for the fitment. From what I have read on this forum, Kooks fit the best.
Go with Kooks 1 3/4 and Hi Flo cats and mid pipe. The fit is perfection and the 1 3/4 are best for a street LS3. I'm also getting one of the NEW factory fit Halltech heat shrouds that fit the factory LS3 intake with no mods, keeps IATs lower.
(Halltech GM LS3/7 Beehive Ram Air Induction Shroud (halltechsystems.com))
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Old Mar 10, 2024 | 10:42 AM
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Buy 1 7/8 headers don’t waste your money on 1 3/4 headers.
if you’re trying to make power
and if you’re trying to make big power go 2”
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Old Mar 10, 2024 | 11:16 AM
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No cams or boast. A bump in power and sound and I'll be happy.
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Old Mar 10, 2024 | 11:23 AM
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Originally Posted by shutout
No cams or boast. A bump in power and sound and I'll be happy.
if you’re looking for sound 1 7/8” headers and Corsa Extreme muffler
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Old Mar 10, 2024 | 01:12 PM
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Search/Research this forum for threads on best header size for a street driven LS3, and mixed in will be threads and posts on drag race LS3 that also use 1 3/4 and have quicker E.T.'s than cars running 1 7/8 headers on the drag strip in high HP builds. Then make your choice.
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Old Mar 10, 2024 | 02:13 PM
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I already have a Borla Atak cat-back exhaust. I won't be taking it to the track.
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Old Mar 10, 2024 | 04:06 PM
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Originally Posted by Last 1
Buy 1 7/8 headers don’t waste your money on 1 3/4 headers.
if you’re trying to make power
and if you’re trying to make big power go 2”

humor me, is there any proof that there is any huge detriment to 1 3/4? Other than maybe a 3-5hp lower gains across the board than 1 7/8
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Old Mar 10, 2024 | 04:07 PM
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Originally Posted by Dzv69
Search/Research this forum for threads on best header size for a street driven LS3, and mixed in will be threads and posts on drag race LS3 that also use 1 3/4 and have quicker E.T.'s than cars running 1 7/8 headers on the drag strip in high HP builds. Then make your choice.

thank you! Too much bs touted by people that think bigger is better with no data.
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