One of the most anticipated debuts of NAIAS 2007, the 2008 IS-F is the first production Lexus to wear an "F" designation, which will distinguish special high-performance Lexus models. The IS-F is based on the rear-wheel-drive IS and powered by a specially tuned 5.0-liter V8 engine that develops more than 400 horsepower and 350 lb-ft of torque.

To put the power to the ground, Lexus developed the world's first eight-speed direct sport-shift transmission. The transmission features an advanced manual mode with paddles located behind the steering wheel to allow the driver to shift manually.

A new torque converter lock-up produces more direct, crisp gear shifts through constant lock-up of the torque converter in second through eighth gears. Precise throttle blips match engine speed to vehicle speed during downshifts.

Impressive Custom Brakes

Lexus claims that zero to 60 mph will be less than 4.9 seconds and an impressive brake package was commissioned to match the speed potential. Developed by Brembo to specifications from Lexus engineers, the front discs are 14.2 inches in diameter with six-piston aluminum calipers. The rear discs are 13.6 inches with two-piston calipers. High-friction brake pads are fitted and the calipers are branded with the Lexus name.

The IS's suspension has a one-inch lowered ride height so the fenders fit tightly over the custom 19-inch forged alloy wheels produced by BBS. A new three-mode version of the Lexus Vehicle Dynamics Integrated Management (VDIM) allows the driver to choose between Normal, Sport and Off modes.

Styling cues that differentiate the IS-F from other IS versions include dual exhaust with quad tailpipes, wider front fenders, a larger grille, a special hood, an enlarged lower air intake and a rear spoiler.

Inside the IS-F includes an oil temperature gauge, shift indicator lights, aluminized composite trim, an "F" logo on the steering wheel and special sport seats with high-contrast white and black trim.

LF-A Gets Additional Refinements

The LF-A supercar concept was first shown two years ago at NAIAS to show a new styling direction for Lexus referred to as L-finesse. The styling of the new version has been refined with the use of more curved surfaces and additional detailing.

The LF-A is still powered by a 500-plus horsepower V10 engine with a front mid-engine placement and a rear transaxle for balance. According to Lexus, the superior aerodynamics, revised styling and horsepower make a top speed of 200 mph possible.

"The first LF-A was a pure concept, but one that we went so far as to conduct engineering analysis on," said Lexus Group Vice President and General Manager Bob Carter. "This latest concept is much closer to a vehicle that we could bring to market, and one in which we will be gauging consumer interest."