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Thread: Spacers for Prostars

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  1. #1
    Senior Member Ruckus46gt's Avatar
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    Quote Originally Posted by BurnTire View Post
    The cobra rotors are larger than the GTs so that is the problem.

    I don't want to cut things being this is still a street car.
    why not just grind the calipers. You can use a small spacer and grind the calipers a little bit. If you take a lot off you have to worry about cracking but dont have to take a super lot of and plenty of people have done it.

  2. #2
    Administrator BurnTire's Avatar
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    Quote Originally Posted by Ruckus46gt View Post
    why not just grind the calipers. You can use a small spacer and grind the calipers a little bit. If you take a lot off you have to worry about cracking but dont have to take a super lot of and plenty of people have done it.
    That is an option. I just hate doing stuff like that. Realistically I need over 1/2 of an inch to get the thread engagement.

    I know many people are running the wheels on the shank engagement only, but from a safety standpoint I want the studs contacting the threads under the bolt section. If 999 cars can do it and 1 car looses a wheel at 130 MPH odds are I will be that car with some of the luck I have.
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  3. #3
    Senior Member Ruckus46gt's Avatar
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    grind the caliper and run a 1/2" or 7/16's space. I org used a 7/16's mr gasket spacer with stock studs on my gt for many many passes then towards the end went to arp 3.5's when i got my 1/2 inch hubcentric spacer(was going to race legal, but before that never had any issues with tech but nobody made me remove the lugs either)

  4. #4
    Senior Member AZSonicSnake's Avatar
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    i think the 3.5 stud would work though. from the looks of things on my car if i had the extra .5 i would be perfect. i only have the 3's right now...

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  5. #5
    Administrator BurnTire's Avatar
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    Quote Originally Posted by AZSonicSnake View Post
    i think the 3.5 stud would work though. from the looks of things on my car if i had the extra .5 i would be perfect. i only have the 3's right now...
    Do you have the ARPs?

    the last 1/2" or so is not threaded.

    I test fitted the stuff with the ARP's and I don't like what I see.

    I am getting tired of this crap. Maybe I will give bogart a call.
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  6. #6
    Senior Member AZSonicSnake's Avatar
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    no i do not. i am not sure exactly what stud i have, but i measured 2.5" last time i had the wheel off. so that means i only have the 3" ones since .5" is in the hub. the last 1/2 or so on the ones i have has no thread. this is part of my concern. i know if i get .5" longer atleast there will be more thread in the nut...

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  7. #7
    Administrator BurnTire's Avatar
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    My stud measures 3.5 end to end and it still is not long enough.

    What size are your spacers?
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    2004 Cobra, Whipple ,TH-400
    Burning Corn
    9.97 - 135.5

  8. #8
    Junior Member Black96SVT's Avatar
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    I have 15x3.5 up front (cant remember back space) with a 1" hubcentric spacer and am fine
    for the rear for 15x10 w/ 6.5" back space I have i believe .5" spacer, ground caliper face, ground banjo bolt and im fine haha
    Kooks LT Pro Chamber Cherry Bomb Extreme Tri Ax w/ Roush Handle VIS Racing Tokico D Spec Roush Springs Front GT Springs Rear Steeda SF Connectors HPM Mega Bite Jr. LCAs UPR UCAs Fluidyne Rad 180 Deg Stat UPR CAI CenterForce Dual Friction Fidanza Fly AEM Wideband AutoMeter FP & N2OP & Water Temp NX Wet Kit & Filter & Heater Cold Fusion Purge NGK TR6 FRPP 9mm
    Tuner: XCal2 SF and D'Agostino and Erick Brooks
    Drag: ProStars 15x3.5 & 15x10, MTs

  9. #9
    Administrator BurnTire's Avatar
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    Quote Originally Posted by Black96SVT View Post
    I have 15x3.5 up front (cant remember back space) with a 1" hubcentric spacer and am fine
    for the rear for 15x10 w/ 6.5" back space I have i believe .5" spacer, ground caliper face, ground banjo bolt and im fine haha
    Does you car have the big 13" rotors like an 04?
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    2004 Cobra, Whipple ,TH-400
    Burning Corn
    9.97 - 135.5

  10. #10
    Junior Member Black96SVT's Avatar
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    Quote Originally Posted by BurnTire View Post
    Does you car have the big 13" rotors like an 04?
    yeah all 96+ Cobra's have the 13"
    Kooks LT Pro Chamber Cherry Bomb Extreme Tri Ax w/ Roush Handle VIS Racing Tokico D Spec Roush Springs Front GT Springs Rear Steeda SF Connectors HPM Mega Bite Jr. LCAs UPR UCAs Fluidyne Rad 180 Deg Stat UPR CAI CenterForce Dual Friction Fidanza Fly AEM Wideband AutoMeter FP & N2OP & Water Temp NX Wet Kit & Filter & Heater Cold Fusion Purge NGK TR6 FRPP 9mm
    Tuner: XCal2 SF and D'Agostino and Erick Brooks
    Drag: ProStars 15x3.5 & 15x10, MTs

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