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

First three mods, bang for the buck.

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Old Apr 2, 2016 | 05:07 PM
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Default First three mods, bang for the buck.

What would you do if you were to pick three? A buddy of mine has an Impala ss and wants to buy three things for it. I know that is a really broad question but what would you do first if you bought a stock car? I'm sure a dyno tune will be one, that is my only one I am sure of.

Ideas?
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Old Apr 2, 2016 | 05:15 PM
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Strut tower braces or a shift kit. I think I would try the kit from Intense this time, Transgo didn't do much .
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Old Apr 2, 2016 | 05:23 PM
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Never thought about those. How about tires? I know from a dig his car pisses me off. It doesn't need drag radials but maybe a good sticky street tire?
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Old Apr 2, 2016 | 05:29 PM
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Maybe Spawne will chime in an tell you what doesn't hook for ****
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Old Apr 2, 2016 | 06:21 PM
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If tires are what you would consider a mod, then dedicated summer/winter wheels/tires. A good summer tire will still 100x better then an all season tire will. As far as what I would do for mods, LS2 intake swap, headers/downpipe, hptuners. Those are your best bang for your buck mods.
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Old Apr 2, 2016 | 09:24 PM
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nitrous, converter, transmission/rear, lighter wheels, tune-up, clean the car, wash the car

keep the OEM tune and OEM air filter. No reason to mess with that stuff until you want to make real power i.e. turbocharger/built engine.
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Old Apr 2, 2016 | 11:11 PM
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Originally Posted by operatorfailure
Never thought about those. How about tires? I know from a dig his car pisses me off. It doesn't need drag radials but maybe a good sticky street tire?
Michelin pilot super sports are really good. I've been through quiet a few tires.these stick,and really increase turn in feeling and response
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Old Apr 3, 2016 | 01:56 PM
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yep 3 sets michelin as3. torque steer gone,of coarse as3 is being discontinued
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Old Apr 3, 2016 | 01:59 PM
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top 3?air in air out,tune for same,flow is way restricted on these cars,coll air system,exhaust and include downpipe in that and then tune,u be surprised how much power gm locked up in there,just my opinion though
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Old Apr 13, 2016 | 04:07 PM
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^air in air out. If I was picking the top three (while not necessarily the best bang for the buck or easy) ls6 intake manifold, full exhaust (headers/no cats), and a dyno tune.
Now if you want 3 cheap/best bang. Shift kit, muffler delete, tune. People might be skeptical on the muffler delete and tune but I have muffler delete and a hand held diablo tune. I can slightly pull on one of my friends 6 speed altima ser with some work done. And he has slightly pulled on his other friends bone stock gxp. So I would imagine a dyno tune would make much more of a difference than hand held. Oh and get that dod turned off. Burns more oil than saves gas in my experience
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Old Apr 13, 2016 | 06:58 PM
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Tires hand down should be a first if you want to go faster. Kinda hard to go fast when all your tires do is spin. Speaking of which looking for a wider rim that someone has experience with on 06mcss
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Old Apr 14, 2016 | 12:41 PM
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Originally Posted by Sint3k
Tires hand down should be a first if you want to go faster. Kinda hard to go fast when all your tires do is spin. Speaking of which looking for a wider rim that someone has experience with on 06mcss
What is the max width you can run on the stock gxp wheels? I believe I've seen 265s. Doubt 275s would fit
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Old Apr 16, 2016 | 08:27 PM
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I run 275/40 on my GXP..
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Old May 31, 2016 | 01:44 PM
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Tires... Continental Contisportcontact5 (stock size). AMAZING (on the front)... conti DW on the back. I am bone stock but nothing has held this thing like the contis. NOTHING. Not just for performance but my ride quality improved "dramastically" (hybrid word - dramatic and drastic combined - feel free to use).
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Old Aug 1, 2016 | 06:28 PM
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I'm running Continental ControlContact Sports on mine. Not 100% impressed with them. Won't be using them again when it's time to replace. Discount Tire talked me into them as I wanted an all season and they claimed these were the best option they sold. Later found out it's a tire only available through Discount Tire so it's probably got a pretty good profit margin for them, and you can't price match as they are only ones who sell them.
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Old Aug 2, 2016 | 07:21 AM
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I would agree with the tire recommendations above.

My picks that exclude tires would be strut tower braces, shiftkit, and dyno tune.

My tune deactivated DoD and really turned the car on. I went to Mike at New Era Performance.

I did the shift kit myself by following the stickied thread. The Strut tower braces are easy to put in as well.
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Old Aug 9, 2016 | 07:17 PM
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#1 Trans cooler,
#2 intake manifold, it's a toss up between this and the ls2 intake on what's the worst one made.
#3 tune it, get the benefits of ditching the crap ls4 mani.
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