I had a 36mm hollow bar on an 87 GN. I believe it was 10-12 lbs. lighter. However, when we installed a PTE SLIC, the bar would not fit back on the car as the intercooler was too big to allow for it to go back on. As I recall, the PTE expanded toward the front of the car, stopping the 36mm bar to wrap around the front of it. We had to put the stock one back on.