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GXP Brake upgrade - parts needed?

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Old Oct 26, 2007 | 11:17 AM
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Default GXP Brake upgrade - parts needed?

Hey guys, since i'm installing 20" wheels soon (test fitting before winter, actually) i'm looking to upgrade the Imp's brakes to the GXP setup and was wondering if any of you know where to find this stuff. I've checked eBay, Rockauto and Autozone, but there are no specific listings for the GXP...and if there is, it specifies that it's not for the "performance package."

If you have a recent GXP parts list, let me know the part numbers for the Calipers, Brackets and Rotors, please. I think that's all i'd need, really...well, besides the pads, which i'd go aftermarket for.

Lastly, does anyone know if there would be any problem doing this? Someone posted a while ago that the GXP calipers bolted right up. Would the brake booster function properly with the new calipers? Would there be anything in the computer that would hinder this install?

Thanks!
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Old Oct 26, 2007 | 11:19 AM
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Give me about 20-30 mins and I will pull up the GM part numbers for you.
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Old Oct 26, 2007 | 11:26 AM
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Front Rotors:
GM part Number 88965592
Front Cals
Left: 89060373
Right: 89060374

Rear Rotors:
GM Part Number :18048699
Rear Cals
Right:88965582
Left: 88965582

www.gmpartsdirect.com
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Old Oct 27, 2007 | 04:58 PM
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Thanks Taz! How bout the brackets?
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Old Oct 27, 2007 | 06:09 PM
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****, I knew I forgot something. Ill get those for you monday.

Last edited by Taz34SS; Oct 27, 2007 at 06:15 PM.
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Old Dec 19, 2007 | 09:09 PM
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buff did ya have any luck with this GXP setup?? I'm thinking it's time to upgrade my brake system before I do to much more to the car. Debating on just getting a set of the R1 concepts premium rotors with either semi-metallic or ceramic pads but having the 20's on the car makes the rotors look just.... I guess miss proportionate?? That giant gap there now is just disturbing lol, was thinking of trying to find a set of larger rotors for the car but having no luck when searching the net for it.

I guess if I did have to go with the R1's is it better to go drilled, slotted, or drill/slotted. It seems they both have their pro's con's just curious on what people experience with the rotors has been so far. Guess also if there are better brands just atm seems to me that the R1's are front runner in my opinion since Brembo has nothin for our cars yet
drilled- got crack?
slotted- pads get used up like a hooker on the Vegas strip
drilled/slotted- ...don't even wanna give this one a description
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Old Dec 20, 2007 | 07:52 AM
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No, no luck. I've been looking on eBay and have found nothing...and Ed Morad (common GP salvager) hasn't listed much in the line of brake parts.

I'm also considering the R1's in the spring before I put the 20" on...that is unless I can find GXP's by then.
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Old Dec 20, 2007 | 02:16 PM
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Ask Ed if he has any GXP brakes for sale. He might not put these up on Ebay because of the fact that most of the people off Club-GP want these and it would be a waste of time to list on Ebay. Send a message to him via Club-GP.
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Old Dec 29, 2010 | 12:22 AM
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I know this is a Dead thread but was wondering if anybody had the part number for the brackets?
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Old Dec 29, 2010 | 09:19 AM
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heres the link from zzp. front gxp, 12" rears, and on for the 13" fronts. brackets are included.
http://www.zzperformance.com/grand_p...1238&catid=138
http://www.zzperformance.com/grand_p...1093&catid=138
http://www.zzperformance.com/grand_p...1041&catid=138
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Old Dec 29, 2010 | 02:19 PM
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Thanks I just saw that last night..
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Old Dec 29, 2010 | 02:54 PM
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There's a f-body conversion kit and just a caliper install kit on there too. Might be able to find some cheap f-body calipers or something, but you still would have to upgrade to the longer brake lines and it gets spendy fast...

http://www.zzperformance.com/grand_p...=860&catid=138
http://www.zzperformance.com/grand_p...=591&catid=138
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Old Dec 29, 2010 | 03:37 PM
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The f body is basically wat we already have so in my opinion it isn't worth it.
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Old Dec 29, 2010 | 04:13 PM
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I remember there being a thread with a C5Z06 brake upgrade somewhere. I've seen it done on a 00-05 Impala in person.
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Old Dec 29, 2010 | 04:16 PM
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Here's a set of 4 for under $400

http://cgi.ebay.com/ebaymotors/97-04...#ht_1280wt_939
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Old Dec 29, 2010 | 04:18 PM
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Originally Posted by blakss
The f body is basically wat we already have so in my opinion it isn't worth it.
agreed. the only real benefit would be the weight savings. arent the fbody calipers aluminum?
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Old Dec 29, 2010 | 05:05 PM
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Yea supposedly 10 pounds lighter but for the price I'd rather get on a diet to save some weight lol
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Old Dec 29, 2010 | 05:22 PM
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definitely. ive seen a guy on my other forum put a set of brakes off of the ctsv on his monte. ill look for the thread.
found it. im sure its not a direct bolt on, but he never got into detail about what was needed to make it work or if he ever got it together. hes also a member on here with a gxp.
http://montecarloforum.com/forum/sho...ghlight=brakes

Last edited by TheMonteMan; Dec 29, 2010 at 05:35 PM.
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Old Dec 29, 2010 | 05:26 PM
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Originally Posted by ImpSS07
what kinda brackets do we use to upgrate to c5 stuff? same as the fbody upgrate stuff?

http://cgi.ebay.com/ebaymotors/Corve...item20b628a20d

Last edited by 91_rs-teal; Dec 29, 2010 at 06:04 PM.
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Old Dec 29, 2010 | 05:41 PM
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10 lbs on each corner in unsprung weight is a whole lot different than removing 40 lbs of sprung weight.
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