Lexus has announced that their F Sport performance accessories will go on sale at promotional prices.
The Lexus F Sport performance accessories apply to the IS sport sedan, IS convertible coupe and the GS 350 RWD luxury sport sedan and the promotion will begin on June 1st and end on July 31st.
The Lexus F Sport suspension kit is now offered at a discount price of 1,450 USD, which means a reduction of 549 USD, and it includes 1 inch lowered suspension springs and a rear chassis member brace plus anti-sway bars front and rear for the RWD models, and only at the rear for the AWD variants. 
If you add wheels and tires to the Lexus F Sport suspension kit then the price goes up to 4,495 USD, and that means saving 1,499 USD.
If on top of everything mentioned above you also decide to add a set of upgraded brakes with 6-piston fixed calipers and cross drilled cast-iron 14-inch
diameter rotors at the front and 4-piston fixed calipers
and cross drilled cast-iron 13.6-inch diameter rotors at the rear then total price jumps to 8,995 USD which represents a savings of 1,479 USD.  

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Source: Lexus