McLaren M4a 1967
In 1967 Robin Herd produced three major design: Can-Am, Formula 1 and Formula 2. The M4A was a simple monocoque for Formula 2 and raced by Bruce seven times.
Some chassis appeared in Formula 3 guise. Piers Courage raced an M4A in the 1968 Tasman Series and gave the M4A its only major victory, it did however prove very popular and won many races in New Zealand.
Chassis: Bathtub monocoque formed from aluminium paneling bonded and riveted to four mild steel bulkheads
Suspension: Single top link with radius arms and lower wishbones, outboard coil spring/shock units and anti-roll bar in front. Twin radius arms, reversed lower wishbones and single top links with outboard coil spring/shock units at rear. McLaren-Elva cast magnesium wheels, 13 x 7 front, 13 x 10 rear (5.00 and 6.25 - 13 tyres)
Brakes: Girling or Lockheed 10½ inch discs all around with AR calipers
Body: Formed by monocoque sides plus fibreglass nose cone and cockpit surround
Engine: Cosworth-Ford FVA 1600cc 4-cylinder unit with five-speed Hewland FT200 transaxle
Dimensions: Wheelbase 90 inches, front track 54 inches, rear track 54 inches, overall length 121 inches , height 30 inches, weight 830 pounds.