Be careful. Cops will ticket you if too dark and then you can't get annual safety inspection approval until corrected.
Pro Tint in Selma/Smithfield across from Pizza Inn in the strip mall area. They can tint as dark as ya want or just barely legal tint. 8) Very good work and good price as well.
Tinted Image in Garner on HWY 70... Just down the road from White Oak so not too far from Clayton! They did a great job on my father in laws SUV.
Tinted Image I second that for Tinted Image. They recently did two vehicles for me and do good work with a good price.