For some "weird" reason - McGard's website and even your local Chevy/GM dealer's parts catalog indicate that these locknuts are the correct size for a 2018 Camaro LT1 with RS package - front 20" and rear 20" - BUT and it's BIG - "BUT". If you were to use them - they wouldn't secure the wheel in any shape/form/way etc - like in reality - these lock nuts would after cut into the rim after tightening and significantly damage the rim and wouldn't even come out from afar to protect the wheels from theft - thieves just need to remove the other lug nuts and remove the wheels from the lug studs as they will cut the rim and a Make nut hole the same size as the lock - totally useless - real wheel nuts from GM - a really odd detail # and they don't actually have a nut cap that is apparent makes sure your wheels are protected - I went to the local lows and found grommets that also seal the lock nut and the wheels look really nice - each grommet is all worth $1 - making it a really good investment - so - yes - forget it - if you have a 2018 Camaro with the RS package and the staggered rim package ok tires - these locks are NOT for you - buy the right ones from Chevy - $65 - what an "oops" - but - note EACH rim is $695 and then the tires - Goodyear Run Flats are sold at a $1500 discount for a set of 4 - so - 695x4 = $2,780 - add tires - $1,500 - total "Oh" - $4,280 - so YA - $65 - absolutely and totally worth it. Just get the RIGHT locks, my point.