LS4 Performance Grand Prix GXP | Monte Carlo SS | Impala SS | LaCrosse Super

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Old 07-12-2011, 01:21 PM
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So I went into a shop and was like what can you do to up the power? He said well pretty much nothing since u already have a cat-back, intake, and tune. He said all i can really do now is just headers and cams wow.... so is there anything else i can do to my car?
Old 07-12-2011, 01:32 PM
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turbo
Old 07-12-2011, 01:36 PM
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Gears, upgraded internals, a better flowing exhaust, weight reductions, turbo, better wheels, intake mani swap, etc.
Old 07-12-2011, 01:52 PM
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Spray it! I don't think I've seen any LS4 cars running nitrous yet.
Old 07-12-2011, 02:01 PM
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Send it over to me!!

Intake manifold swap followed by springs and 1.8 roller rocker arm swap. Use the LS6 yellow springs, with Viton PC seals and any bolt-on rocker. If you don't plan on ever changing the camshaft, then go with the LS1 intake. It is a little better up to 5000rpm, after that the LS6 rocks up to 6500.
I loved my LS1 intake, with the stock cam and rockers. The engine was very snappy!

Headers will add a few hp up top, but you would get more of a gain with the intake manifold and rockers.
Old 07-12-2011, 02:03 PM
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Originally Posted by ImppyLS4
So I went into a shop and was like what can you do to up the power? He said well pretty much nothing since u already have a cat-back, intake, and tune. He said all i can really do now is just headers and cams wow.... so is there anything else i can do to my car?
He is telling you the truth as far as bolt-on/in items go.
Old 07-12-2011, 02:22 PM
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I have the same thing and i was wondering also lol. all these manifold intake, rockers, wires stuff seems complicated and i dont even know what these do lol, props to you guys
Old 07-12-2011, 02:48 PM
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Originally Posted by Low91
Spray it! I don't think I've seen any LS4 cars running nitrous yet.
There are/were more than one...
Old 07-12-2011, 02:58 PM
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I know it's not a fun/cheap mod but build your transmission(converter too), install a shift kit, get a big trans fluid cooler and get a tune.

Extra insurance for future mods, and a great drivability mod too.
Old 07-12-2011, 07:51 PM
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As far as bolt on that sounds about it but I'm really like the idea of a turbo anyone have one on? And where the **** would one go lol there's no room under there
Old 07-12-2011, 07:52 PM
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Cartuning.com
Old 07-13-2011, 10:47 AM
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Originally Posted by ImppyLS4
As far as bolt on that sounds about it but I'm really like the idea of a turbo anyone have one on? And where the **** would one go lol there's no room under there
Oh yes there is!! Lol!! GXP Jay was the 1st. check it out on you tube!
Old 07-13-2011, 04:21 PM
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Originally Posted by DavidGXP
Cartuning.com
cartuning.ca
Old 07-13-2011, 04:41 PM
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http://www.turbo-kits.com/impala_ss_turbo_kits.html

man If i had the money and know-how This thing would be in my car...
Old 07-13-2011, 04:59 PM
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New members lol...

Seriously though, build the trans...
Old 07-13-2011, 05:59 PM
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Buy my rockers and springs




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