Thread: difference between gxp front brakes and impala police

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  1. #1 difference between gxp front brakes and impala police 
    SE Level Member chrisrexmandie's Avatar
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    Are gxp and impala police brakes the same size? I have seen multiple threads that say they both have 12.7" rotors and then others that say the gxp is 323mm and the impala has 303mm. Can anyone clarify?
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  3. #2 Re: difference between gxp front brakes and impala police 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    Impala brakes are smaller than GXP brakes.

    302.8 for Impala and 323 for GXP.

    If you want solid front rotors for the GXP you need front brakes for a Buick Allure/LaCrosse (super) with the 5.3 V8 engine. They are the same 323mm with non drilled rotors. The AC Delco part number is 18A2414.

    You can probably find rotors at a NAPA store too if you went that route.

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  4. #3 Re: difference between gxp front brakes and impala police 
    SE Level Member chrisrexmandie's Avatar
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    would those calipers and brackets from the Buick bolt right up to a GP?
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  5. #4 Re: difference between gxp front brakes and impala police 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    Maybe.

    You'll need to do your own homework there. Look at rockauto and start cross referencing part numbers to see what might be the same.

    Or go to a store and ask to see a caliper for a GXP and a caliper for a Buick.

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