Brake Technicality
Thread Starter
Instructor
Joined: Sep 2017
Posts: 138
Likes: 9
From: Alabama
Brake Technicality
First off yes, I did try searching the forum for this answer already. To be honest the searching on this forum really sucks or I'm not doing it correctly, either way I still need some info. My car is an 07 base BUT has the Z51 option as well as the JL5 and J55 RPO codes (I think those are the brake codes). My issue is I ordered a Wilwood rotor kit from Summit (Wilwood #140-9336D) and found that the rear rotors are to small I didn't even try the front. Yes I know send them back, already done. The kit states it's for a base model but clearly it doesn't fit. My rear rotor measures almost 13 inches. Summit is still scratching there head and Wilwood said they don't make a rotor that size for a base car. I'm thinking that the rotors for the Z51 are the same size a s a Z06 but without the calipers? Looking for someone to shed some light here.
Race Director
Joined: Sep 2009
Posts: 11,332
Likes: 2,432
From: Eastern
Here is the size of the rotors on the C6.
Not sure what the GS sizes are.
Base
Front - 12.8" x 1.26"
Rear - 12.0" x 1.0"
Z51 optioned
Front - 13.4" x 1.26"
Rear - 13.1" x 1.0"
Z06
Front - 14.0" x 1.26"
Rear - 13.4" x 1.0"
BTW, I also find searching the forum using the search is hit and miss. I always ask the question on google putting C6 Corvette in the front of the search and that seems to get the forum thread hits associated with the question. As an example, try using google and put this in the subject line.
C6 corvette brake rotor sizes.
you will get hits.
Not sure what the GS sizes are.
Base
Front - 12.8" x 1.26"
Rear - 12.0" x 1.0"
Z51 optioned
Front - 13.4" x 1.26"
Rear - 13.1" x 1.0"
Z06
Front - 14.0" x 1.26"
Rear - 13.4" x 1.0"
BTW, I also find searching the forum using the search is hit and miss. I always ask the question on google putting C6 Corvette in the front of the search and that seems to get the forum thread hits associated with the question. As an example, try using google and put this in the subject line.
C6 corvette brake rotor sizes.
you will get hits.
Last edited by 4SUMERZ; Dec 28, 2021 at 03:19 PM.
Race Director
Joined: Sep 2009
Posts: 11,332
Likes: 2,432
From: Eastern
The wilwood site has close to the correct rear rotor size of 13.0 x 1.1 for a Z51
but the front 13.4 is not listed. It has 14" x 1.25 or 13.06 x 1.25 which is closer to 13.4 of Z51
but the front 13.4 is not listed. It has 14" x 1.25 or 13.06 x 1.25 which is closer to 13.4 of Z51
Last edited by 4SUMERZ; Dec 27, 2021 at 03:42 PM.
Race Director
Joined: Sep 1999
Posts: 12,422
Likes: 905
From: CONCORD NC
The Z51 setup was a GM anomaly.....slightly larger rotors with the same weak calipers. Marketing only. Track guys swapped the brackets and ran the smaller, yet cheaper and readily available base size.
Melting Slicks
Joined: Nov 2007
Posts: 2,276
Likes: 550
From: Pittsburgh PA
St. Jude Donor '10-'11-'12-'13-'14
Race Director
Joined: Sep 2007
Posts: 16,557
Likes: 2,104
From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
The whole confusion existing here is that Z51 is simply an OPTION on a base car, NOT a model.
The Z51 option includes J55 brakes. The J55 brakes (aka heavy duty brakes) were also available as part of the F55 (mag ride) option from '07 thru '13 and as a stand alone option on all base cars from '05 thru '13.
The standard brakes on all base cars was RPO code JL9.
The Z51 option includes J55 brakes. The J55 brakes (aka heavy duty brakes) were also available as part of the F55 (mag ride) option from '07 thru '13 and as a stand alone option on all base cars from '05 thru '13.
The standard brakes on all base cars was RPO code JL9.
