SuperPro RC0021RZ-20 20mm 2-Position Adjustable HD Rear Sway Bar Kit - Mazda RX-7 FDSuperPro RC0021RZ 20 20mm 2 Position Adjustable HD Rear Sway Bar Kit Mazda RX 7 FD If you are looking for increased cornering capabilities with decreased body roll, Roll Control sway bars are the answer! Adjustable sway bar rates can be increased between 30 50% over OE sway bars by simply changing the end link position on the sway bar. In addition to the fundamental body control and roll reduction adjustable bars allow owners to quickly and easily