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PURCHASED MY BEAST '08 BASE 6SPEED W/ LG BUILT MOTOR AND Z06 REAR FENDERS 18X9.5-19X12 SPYDER WHEELS. BUT WANT TO GO TO Z51 BRAKES. JUST WANTED TO VARIFY ALL I HAVE TO CHANGE IS THE CALIPER MOUNTING BRACKET? TO CLEAR THE BIGGER ROTORS, OR ARE THE CALIPERS DIFFERENT ALSO?
 

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Your JL9 calipers front are identical to J55 (Z51) .your JL9 rear calipers will work exactly w / the J55 but believe it or not the rear JL9 piston in the calipers are larger than the J55 piston in rear calipers.

If you are upgrading to the J55 . the rotors Are larger ( 13.3 ) and require the J55 Caliper mounting brackets also the brake pads for J55 are different compound than JL9 but exact same size better bite but people do wine about the extra brake dust Some guys actually use the JL9 pads because of the less brake dust . Like you are not going to wash the rims any way while washing the car 😂 (some of these lunatics don’t even want water to touch there Vette while washing???)

so
4 J55 Rotors ( flat finish - machined - slotted & machined or just slotted ) you don’t want to skimp on Rotors. If you buy a cheap rotor what is the sense in even doing the brake upgrade

1 set of front J55 pads ( the selection can make
brain bleed)
1 set rear J55 pads
4 J55 caliper mounting brackets

Possibly depending on your application maybe 4 braided steel brake lines ? If you plan on tracking your car 🍀
 
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