My old C4 back hatch window imploded. Had the roof out was on the highway, road was smooth but little uneven felt the car body twist a bit a bang the window shattered scared the crap out of me. Made a call to GM customer service next day ask if they any issues with this the refused to talk...
Purchase APR rear deck spoiler form FR SPORT Amazon.com.they had the best prices.
It arrived last week need to pick it up in Port Huron will post pics when I installed it before and after.
Pretty excited.