C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

brakes? how do i tell?

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Old Apr 9, 2014 | 06:55 AM
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Lloyd Smale
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Default brakes? how do i tell?

How can i tell if i have standard brakes or heavy duty. I need to order parts and dont know.
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Old Apr 9, 2014 | 07:44 AM
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Year? look under the armrest console there is a stiker with your car RPO's JL9,J55...

Early C4s come with 16" wheels and a single pistons calipers and 11,5" rotors,even the Z51 package has single pistons calipers.
The "big brake" package came with the introduction of 17" wheels in 1988.They use 13" rotors and double pistons calipers

this is a 13" rotor vs a 11,5 rotor

[IMG][/IMG]

Last edited by tunedport85inject; Apr 9, 2014 at 08:10 AM.
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Old Apr 9, 2014 | 07:48 AM
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Originally Posted by Lloyd Smale
How can i tell if i have standard brakes or heavy duty.
Easy
J55 HD front rotors are 1" (26.5 mm ) thick ; the std ones are more like 3/4" (19 mm )



Last edited by vetteoz; Apr 9, 2014 at 07:52 AM.
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Old Apr 9, 2014 | 11:10 AM
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its a 92 code in glove box says jl9 so i take it there the standard ones?

Last edited by Lloyd Smale; Apr 9, 2014 at 11:19 AM.
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Old Apr 9, 2014 | 11:48 AM
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yes they do
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Old Apr 9, 2014 | 12:36 PM
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thanks for the help
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