Have you read the tech article? Is this an interior piece? Only for cars with the rear seats removed? Thanks

 

I've made it and I noticed the difference in handling. Although every guy will tell you that it dont work. I'm telling you I did it and it helped. And you dont have to take out the rear seat but just the rear seat belts. As for me though I just took out the rear seat totally. I found out the rear seat weights like 30lbs. And the seat belt system for the rear about 9lbs. So I took it out.