GS 430. 4D Sedan. 4.3L V8 SMPI DOHC 32V. 6-Speed Automatic Electronic with Overdrive and ECT-i. RWD. Blue Onyx Pearl. and Black Leather. Hurry in! You won't find a cleaner 2006 Lexus GS than this well-appointed creampuff. J.D. Power and Associates gave the 2006 GS 4 out of 5 Power Circles for Overall Initial Quality Mechanical. The precision-tuned 4.3L V8 SMPI DOHC 32V powerhouse delivers substantial horsepower and torque to get you where you need to go...and fast!...