Cool find - at this link I found a spec sheet
SUPERGT.net | 2008 Team Information
Machine
Car KUMHO BOXSTER-GT
Based Vehicle PORSCHE BOXSTER
Chief Engineer Daiyu Watanabe
Machine Specifications
Car Model 986
Dimensions (L x W) 4362mm x 1880mm
Weight 1140kg
Wheelbase 2439mm
Tracks (F / R) F:1465mm / R:1530mm
Transmission Hewland 6 speed sequential
Clutch Tilton Twin metal plate
Suspenssion F:
R: Double wishborn push rod
Double wishborn push rod
Brakes F:
R: Brembo 6Piston
Brembo 4Piston
Tires
F:
R: KUMHO
280/710-R18
280/710-R18
Wheels
F:
R: Taneisya
11J-18
11J-18
Engine Specifications
Engine Model M96/77
Type Horizontally Opposed 6-cylinder NA
Displacement 3598cc
Bore & Stroke 100.0mm x 76.4mm
Restrictor (size × number) 27.4mm x 2
Max Power Over 350PS/8000rpm
Max Torque Over 32.0kg-m/7000rpm
Lubricant (brand) WAKO's
Engine Tuner / Maintenance
Engine Tuner MID WEST RACING
Machine Maintenance ARKTECH MOTORSPORTS