chazc6

Can someone please tell me how to verify oem z06 wheels? If they don't say speedline does this mean there repros. I had a chrome set that said speedline made in italy that where actually heavier than the polish set made in the USA. There polish with the following info on them.
19X12JX59
191410
USA
WT2M1
CHF 959
4356
GM

18X9.5JX40
023321
USA
WT2M1
CHF 959
4356
GM

LS1LT1

Hmm, usually any kind of 'GM' stamp means that they are in fact OEM/factory wheels but the replica wheel companies might've gotten hip to that trick maybe?
Made in the USA, that's cool though.

j_digi454

Modshack

Chromed wheels are usually heavier than polished..

carboman

All factory wheels are stamped "GM"

Kent1999

GM stamp says its a factory GM wheel.

Speedline made many of the GM OEM Z06 wheels - some consider the Speedlines to be the better of the OEM wheels, but I haven't heard of problems with either OEM manufacturer.

Cheers,
Kent

427Z

all 2006 and a few 2007 Z06's got the Amcast built "USA" wheels. 2007 -2008 Z06's got the speedline wheels. the speedline wheels are slightly lighter when you compare the same finish like polish to polish.

what you have there is a set of 2006 or early 2007 amcast oem wheels.

the repros say nothing on the back hubs. speedline is better than amcast but both high quality IMO

i have had several sets of each

chazc6

Thats what i thought, but i didn't think they would be 2 lbs heavier per wheel.

BEZ06

I don't believe chrome was an option in 2006.

If you have a set of early Amcast factory wheels that are chrome, they may have an aftermarket chrome job on them.

I have a set of OE wheels that are chrome on my 2005 coupe that are factory original wheels but they didn't come from the factory chromed. You can tell if they have an aftermarket chrome job because the factory chrome wheels come with painted barrels, and the aftermarket chrome wheels come chrome all over the entire wheel. The aftermarket ones usually come with a generic center cap with some generic cross-flag logo instead of the factory chrome colored center cap with proper C6 crossed-flags.

Bob

chazc6

Thanks for the info.

chazc6

Thanks
This is good to know, I was thinking about buyinig a chrome set.

Modshack

Not a surprise to me...Chrome alone is usually good for up to 1.5 lbs depending on the quality and completeness of the job. The different manufacturer may account for the rest even if the actual chrome penalty is less....