Purpose, Function
By lengthening the exhaust passage, the transmission of exhaust pressure waves to other cylinders can be delayed, and the amount of gas exhausted from a cylinder and forced back inside the combustion chamber is reduced By reducing the residual gas, the temperature inside the combustion chamber is reduced and the occurrence of knocking even at a high compression ratio is inhibited.
Construction
The exhaust manifold is installed to the rear of the engine. In addition, the catalytic converter (WU-TWC) is integrated (WU-TWC).

When the No.1 cylinder is at the intake stroke, the No.3 cylinder is at the exhaust stroke. By inducing the high temperature gas exhausted from the No.3 cylinder into the No.1 cylinder, the high temperature gas in the No.1 cylinder remains. If the amount of residual gas is high, the temperature in the combustion chamber rises and knocking can easily occur. With the 4-2-1 exhaust system, the transmission of exhaust pressure waves between each cylinder is delayed by the long exhaust pipes.

Exhaust System Removal/InstallationRollover Valve
Purpose, Function
Prevents fuel from flowing into the evaporative gas passage during sudden
cornering or vehicle rollover.
Construction
The rollover valve is built into the fuel tank.
U.S.A. and CANADA
Except U.S.A. and CANADA
The rollover valve con ...
Liftgate Lower Trim Removal/Installation
1. Remove the following parts:
a. Liftgate upper trim.
b. Liftgate side trim.
c. Liftgate recess.
2. Remove fasteners A.
3. Take the shaded area shown in the figure, and pull the liftgate lower trim
in the direction of the arrow in the order of (1), (2), (3), (4) and remove it while ...
Cylinder Head Cover
Purpose, Function
The cylinder head cover prevents foreign material penetration and engine
oil spatter.
The oil baffle plate reduces engine oil consumption by separating the engine
oil from the blow-by gas.
Construction
The lightweight cylinder head cover is made of ...