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GXP Brake Upgrade

 
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BaseLS
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PostPosted: Sun May 01, 2016 9:48 pm    Post subject:  GXP Brake Upgrade Reply with quote

So I've been considering doing a complete brake system upgrade on my 04 ss. And since I want to be able to stop on a dime with the power gains i will have in the future, I have been considering getting the 04+ Grand Prix GXP calipers, rotors and pads front and rear along with Goodridge stainless lines, Has anyone done this conversion or know if they are direct bolt ons? Really appreciate info and tips

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IffyG
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PostPosted: Tue May 03, 2016 3:19 pm    Post subject:   Reply with quote

It's a direct bolt on, but you will need after market 18" wheels for them to fit.

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BaseLS
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PostPosted: Tue May 03, 2016 10:04 pm    Post subject:   Reply with quote

really? Sad I hear in some cases they fit certain 17 inch wheels, but I haven't heard which ones. I really like the stock 17's rims on my ss, what if I file down the the calipers a bit? Laughing

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BaseLS
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PostPosted: Mon Dec 19, 2016 2:22 pm    Post subject:   Reply with quote

Ok so I have acquired and test fitted some GXP calipers onto my ss and contrary to popular belief, the clear my stock 17" wheels just fine. It is indeed a direct bolt on. With the clearance issue out of the way I can go ahead with the remaining bits. The stainless steel kits show there are 5 brake hoses to he replaced but I haven't had time to look for it lately. Does anyone know where that 5th brake hose is? They say it's on the frame

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BaseLS
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PostPosted: Mon Dec 26, 2016 2:13 pm    Post subject:   Reply with quote

So friday i decided to go ahead and being the conversion, the rotors fill up the wheel space nicely. Sadly i discovered that the stock banjo bolts do not thread into the GXP calipers so i had to set the car on standby til my new ones come in



I still have not found the 5th rubber brake hose so i will just replace the 4 rubber ones at the calipers until the pressure bursts it so i can find out if it's really even there Laughing

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PostPosted: Mon Dec 26, 2016 6:00 pm    Post subject:   Reply with quote

Looks good...I was hoping someone would chime in on the fifth hose because I'm really not sure on this. I think it is only used in a Pontiac brake system.

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BaseLS
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PostPosted: Wed Dec 28, 2016 12:50 am    Post subject:   Reply with quote

I was hoping on input on that matter too. I traced all lines from the cylinder to the calipers. Zzp told me where'd it would be but I just could not see it. If it really is only found on the Pontiacs I ask myself why given the fact it's the same platform. Unless there's a benefit from it but I don't see how. I will take a close look next time a grand prix comes into the shop I guess Rolling Eyes

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PostPosted: Wed Dec 28, 2016 11:36 am    Post subject:   Reply with quote

I left the mystery 5th hose off mine too, I remember the discussion years ago but cant remember where or if it was found

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BaseLS
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PostPosted: Wed Dec 28, 2016 3:32 pm    Post subject:   Reply with quote

Pitch Black SS wrote:
I left the mystery 5th hose off mine too, I remember the discussion years ago but cant remember where or if it was found


Was pedal feel still firm? Any downsides down the road? Because I'm about to bring my car in and install the banjo bolts and do the rear lines soon hopefully and I'm done worrying about a line that doesn't exist on Impalas. I'm going to leave mine out as well

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PostPosted: Thu Dec 29, 2016 3:10 am    Post subject:   Reply with quote

My 03 impala had the 5th brake hose. Never changed it cause I forgot. It's just above wheel level on the passenger side, behind the strut. From the caliper you have a rubber hose , then a short metal line, then a short rubber hose. This is the "5th brake hose"

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PostPosted: Thu Dec 29, 2016 1:20 pm    Post subject:   Reply with quote

Interesting that zzp would give false information. But I have both my Impalas here at the shop so when I get a chance I'll throw one in the air and look for this hose. Thanks for the input ScottMpala

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PostPosted: Fri Dec 30, 2016 4:22 pm    Post subject:   Reply with quote

ScottMPala wrote:
My 03 impala had the 5th brake hose. Never changed it cause I forgot. It's just above wheel level on the passenger side, behind the strut. From the caliper you have a rubber hose , then a short metal line, then a short rubber hose. This is the "5th brake hose"


that sounds familiar

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PostPosted: Thu Jan 19, 2017 4:43 pm    Post subject:   Reply with quote

Haven't gotten around to looking for the 5th brake line since I've been monkeying around getting the gen V swap taken care of. But honestly as it stands right now the brakes are night and day from stock. I'll probably just leave it once my car is drive able once again

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