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PostPosted: Sun Jul 25, 2010 3:46 am 
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Does anybody out there know the currect stock size for the Font & rear brakes currently on the 2004 GP
GT2 ??? Reasking the above question: are the rotors 11" or 12" in the front & whats on the rears ? anybody know???


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PostPosted: Thu Aug 12, 2010 9:43 pm 
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The fronts are 11.7" diameter and the rears are 10.63" diameter.

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PostPosted: Sun Aug 29, 2010 10:08 am 
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More Questions on 2004 GP GT2 Brakes: My brakes are starting to go looking for good brake upgrade....
(1) Are these current stock 04 GP brakes (11.7) front & (10.63 rear) considered an upgrade form the 97-03 GP model years ?
(2) How much of a difference or what is the difference between the 04 GP Brakes vs the F-body brake upgrade ?
(3) If F body upgrade is the way to go on the 2004 GP GT2; exactly what parts do I need & what is the part numbers & prices ?
(4) Will I be able to upgrade to 17" Rims & tires in the future with F-body brake upgrade ? What are problems will I run into ?
(5) What is the difference between the Impala brake upgrade vs F-body brake upgrade for 04 GP GT2-which is better upgrade ?
(6) Bear in mind I/m looking for better brakes than stock for 2004 GP GT2--for the street not racing with the abilty to upgrade to 17" rims & 17" tires..
(7) Also like to go to stainless steel brake lines do I need long lines or short lines ????
(8) I need somebody out there to give a parts list & prices for what is needed based on the info above-someone that understands brake systems---reason I'm asking is there too much conflicting info out there. Some people did this and that but they do it to a 97-03 Generation GP not 2004-2008 Generation GP.
Thanks TP
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PostPosted: Mon Aug 30, 2010 1:47 am 
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IMHO if your just using them for street use than just get the stainless brake lines and ceramic brake pads. I'd only recommend upgrading the brake caliber unless your adding more hp to the engine.

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Last edited by Malefic_GP on Mon Aug 30, 2010 1:50 am, edited 1 time in total.

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PostPosted: Mon Aug 30, 2010 9:02 pm 
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The F-Body calipers have dual pistons for more braking power compared to the stock calipers. And with the larger 12" rotors and stainless steel brake lines you'll really notice a difference.

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PostPosted: Wed Sep 15, 2010 10:14 pm 
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Impala 12" caliper upgrade: cast iron calipers
F Body 12" caliper upgrade: aluminum calipers, equal stopping power as impala calipers but lighter

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PostPosted: Wed Sep 15, 2010 10:43 pm 
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GXP 13" rotor dual pistons: biggest and possible best option for the best upgrade

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PostPosted: Thu Sep 16, 2010 6:01 pm 
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Nitemare_05GP wrote:
Impala 12" caliper upgrade: cast iron calipers
F Body 12" caliper upgrade: aluminum calipers, equal stopping power as impala calipers but lighter

The Impala calipers don't have dual piston calipers like the f-body brakes so they have LESS stopping power.

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PostPosted: Sun Nov 07, 2010 1:06 pm 
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Hello all:

Thanks for the info:

For what I read from everybody's feedback; Is it safe to say for a better than stock brake upgrade for 2004 GP GT2 is the following"
(1) Front 12" rotors F-body
(2) Front F-body Dual calipers
(3) Stainless Steel barke lines. Do I need the long or short barke lines???
(4) Front Ceramic brake pads.
(5) What about the rears brakes? Do they need to be upgraded to keep in balance with the front upgrade?
(6) How does this affect the current 16" factory wheel rims or will this upgrade only work with 17 Rims waht are the issues here?
(7) Anybody know of the part numbers for this upgrade. Is it avail from the dealer ???

Thanks


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PostPosted: Sun Nov 07, 2010 8:27 pm 
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1-Better than stock
2-Better than stock
3-Not necessary but gives you better pedal feel. Long is best since you don't want the too short.
4-Same as stock
5-The fronts do most of the stopping so you don't need to upgrade the rears.
6-You will need 17" wheels to clear the larger rotors and new caliper position.
7-12498644 - W-car High Performance Front Brake Upgrade Complete - $335.62
Available at monsterpartsonline.com or any GM dealer. The kit doesn't include the F-Body calipers and I don't know the part number or price.

DESCRIPTION: Brake Upgrade Kit (12" rotors)
For use on 1999 -2002 Chevrolet Monte Carlo; 2000 -2002 Chevrolet Impala; 1997 -2002 Pontiac Grand Prix. This kit includes caliper mounting brackets, 12 inch rotors and high performance front brake pads. This brake package improves driver feel and feedback. Technical Notes: High Performance Brake Pads generate higher temperatures and can warp rotors if not allowed to sufficiently cool between severe uses. This brake package will not fit with stock A???crosslacedA??? wheels. The spare tire may not fit on the front of vehicle with brake upgrade. Monte Carlo and Impala may have this brake package installed stock. This kit includes the following items listed by part number quantity and description: P/N 18046666 - 2 - Pin kit, front brake caliper guide P/N 18024959 - 2 - Bushing kit, front brake caliper P/N 18029829 - 2 - Bracket, front brake caliper P/N 18060640 - 2 - Rotor, front brake P/N 18029828 - 1 - Pad kit, front disc brake

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PostPosted: Sun Nov 07, 2010 11:56 pm 
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The Fbody breaks will fit over stock 16inch wheels, the GXP brake setup won't

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PostPosted: Sat Nov 13, 2010 6:57 pm 
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More questions:
(1) The front stock rotors on 2004 GPGT2 are 11.7 in.
(2) How much of a difference is there in the F-body Front 12" rotor from the front stock 11.7 rotor ..its not that much larger .5 in makes that much differece in a rotor ?
(3) It says in the description, the F-body upgrade fits 1997-2002 Pontiacs; no mention if it fits 2004 GP???
(4) How about brake upgrade from 2004 GTP-next model up from 04GP GT2; does anybody have info (specs) on this ?


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PostPosted: Sat Nov 13, 2010 7:07 pm 
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1 - Correct
2 - It makes a little difference plus the F-Body calipers have dual pistons so the combination stops better.
3 - It will fit ALL 2004+ Grand Prixs
4 - The GT & GTP have the same brakes, the GXP is the only ones that are different.

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PostPosted: Sat Nov 20, 2010 7:33 am 
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Guys from this post got a lot of info thanks..
However:
(1) there is a 50/50 general feedback that says that F-body front setup need to go to 17" rims or
it will work with 16" rims.

(2) My question is will it work with the current 16" Factory stock wheels...has anybody out there in GP land
had this upgrade done to their "2004 GP" with stock 16" rims.
.


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PostPosted: Sat Nov 20, 2010 8:53 am 
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Milestone is right, all the 16" stock wheels from 2004 & up will fit over the f-body brakes and 12" rotors.

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PostPosted: Sat Nov 20, 2010 7:17 pm 
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Question:
(1) I'm up in the air about these stainless steel brake lines; reason being- did some research on line; there are people that are having issues with lines bursting while driving-they say that some of these SS lines are comming forn China and are of poor quality.
They are also saying these lines have to be replaced every 2-3 years ?..Maybe these articles were written a while back and maybe they make better quality SS lines today? I don't know....What are your viewpoints on this ? Lets hear from Pontaic Grand Prix Nation about if you should have SS lines installed or not with F-body upgrade.....


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PostPosted: Sat Nov 20, 2010 7:34 pm 
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Personally I don't feel they're necessary. The stock hoses work fine, and I have never felt the need for SS lines.

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PostPosted: Mon Nov 22, 2010 8:10 pm 
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So no one has any info on the SS brake lines bursting while driving or heard anything about this issue ?

Well another question..took a look at the stock 16" wheels; It looks like the factory stock 11.7 inch rotors clears the rims with some 1/2 to 3/4 inches of play. This leads me to believe that the 12in F-Body rotors will clear the rims with out any issues. However, the factory single piston calipers looks like it just about fits inside the rim. I'm thinking with F-body duel piston calipers are they going to hit against inner circumference of the stk rim? Are the F-body calipers thicker (wider) than than the stock calipers?


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PostPosted: Mon Nov 22, 2010 11:21 pm 
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The f-body calipers are the same size as the w-body calipers, they j ust have dual pistons instead of one. Many GP owners have done this conversion with no issues at all.

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PostPosted: Thu Nov 25, 2010 6:17 pm 
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Well, here is the latest I Found that ZZP Perfromance has a 12 in F-Body brake upgrade kit for the fronts.
Its $249.00 for the calipers, $230.00 for the 12 inch Powerslot rotors and $30.00 for the Powerstop pads (cermanic).
(1) Would do you guys think of this kit? Is it pretty much plug and play? Any body put this kit from ZZP on 2004 GPGT ?
(2) Will the stock rubber brake lines fit to this kit? They say you need longer SS lines so I was wondering if the stock lines will create any issues.
(3) For the "rear brakes", should I replace the 10.63" stock rotors with same size Powerslot rotors and cermanic pads to match the stk rear brakes thus keeping the front and rear brakes in balance.
(4) Will the 2004 GT spare tire fit over the 12" front F-body upgrade ?
Sorry for all the questions.. I need to know all the info and get it right the first time before I commit on this upgrade.....
Thanks ... TP


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