Understanding Option Codes
Thread Starter
Instructor
Joined: Jun 2013
Posts: 160
Likes: 6
From: Richmond Texas
Understanding Option Codes
I'm having trouble with the definition of 3 options listed on my '11 GS Coupe (which I didn't buy new). They are Z16, Z51, and Z52...all of which are listed on the glove box plate. I pulled up the Corvette Action Center RPO Code list for my year and found the Z16 (called "Z16 Performance Package"), and Z52 (called "Performance Package"). Are these one in the same? I remember reading an article that said the Z16 is the suspension package (heavier shocks, sway bars, etc.) along with trans and diff coolers, plus the Eagle F1 Supercar tires. Is that correct? But I hear guys talking about Z51 more often (and see aftermarket badging that says Z51), so what's that? Is that something that's incorporated in the Z16 package? Just confused to see all three RPO codes. Any light you guys can shed on this would be helpful.
Burning Brakes
Joined: Jun 2013
Posts: 867
Likes: 26
From: SW Ohio
I'm sure someone will chime in on this that's very knowledgeable, but my understanding is that the options you list were upgrades (over the base model) specific to the GS model. Includes specific spring rates, heavier F&R sway bar, the larger rims/tires, bigger brake rotors. As for the GY F1 Supercar Gen2 tires, they were part of the order on the GS….IF you also optioned the car with MSRC and the M6.
Team Owner
Joined: Sep 2005
Posts: 20,352
Likes: 568
From: Ventura County, Calif
Z16 - designates the GS specific suspension and brake parts. This post explains it well:
Z52 - designates the Dry Sump Oil System and battery relocation to the trunk. (Coupes with M6 Transmission Only)
Z51 - you already know that is the previous performance suspension on the base car. As you can see from the list above, parts of the old Z51 pkg have been incorporated into the Z16 pkg.
This may be old info to some of you folks here, but for some of the new members, they may not know ...
__________________________________
Z16 Performance Package
The 2010-2013 GS has the Z16 Performance Package which also includes a somewhat modified FE3 Suspension (unique to the GS)
Items included in the Grand Sport Z16 Performance Package:
1. Front Brakes . . . . . . .. Z06 . . . . . . . . .Cross-Drilled 14.0” Rotors and 6-Piston Calipers
2. Rear Brakes . . . . . . . . Z06 . . . . . . . . .Cross-Drilled 13.4” Rotors and 4-Piston Calipers
3. Front Stabilizer Bar . . . Z06 . . . . . . . . .31.0 mm
4. Rear Stabilizer Bar . . . .Z06 . . . . . . . . .27.9 mm
5. Front Springs . . . . . . . Z51 . . . . . . . . .526 Lb Rate
6. Rear Springs . . . . . . . .Z51 . . . . . . . . .645 Lb Rate
7. Front Shocks . . . . . . . .Z06
8. Rear Shocks . . . . . . . . Z16 Specific
(Performance 2.73 Axle Ratio - A6 Transmission Only)
__________________________________
Z16 Performance Package
The 2010-2013 GS has the Z16 Performance Package which also includes a somewhat modified FE3 Suspension (unique to the GS)
Items included in the Grand Sport Z16 Performance Package:
1. Front Brakes . . . . . . .. Z06 . . . . . . . . .Cross-Drilled 14.0” Rotors and 6-Piston Calipers
2. Rear Brakes . . . . . . . . Z06 . . . . . . . . .Cross-Drilled 13.4” Rotors and 4-Piston Calipers
3. Front Stabilizer Bar . . . Z06 . . . . . . . . .31.0 mm
4. Rear Stabilizer Bar . . . .Z06 . . . . . . . . .27.9 mm
5. Front Springs . . . . . . . Z51 . . . . . . . . .526 Lb Rate
6. Rear Springs . . . . . . . .Z51 . . . . . . . . .645 Lb Rate
7. Front Shocks . . . . . . . .Z06
8. Rear Shocks . . . . . . . . Z16 Specific
(Performance 2.73 Axle Ratio - A6 Transmission Only)
Z52 - designates the Dry Sump Oil System and battery relocation to the trunk. (Coupes with M6 Transmission Only)
Z51 - you already know that is the previous performance suspension on the base car. As you can see from the list above, parts of the old Z51 pkg have been incorporated into the Z16 pkg.
Thread Starter
Instructor
Joined: Jun 2013
Posts: 160
Likes: 6
From: Richmond Texas
Thanks for your help guys. Don't know why GM included Z51 RPO code when it's really incorporated in the Z16 (or why they included the FE3 for that matter). Also would have been nice to see the Z52 designated as "dry sump and battery relocate" instead of just "performance package". Guess I don't understand some of corporate's logic. Referencing icntdrv55, my car's an M6 but wasn't optioned with the MSRC, however it does have the F1 Supercar tires. Again, thanks for your help.
