1 Install
a larger diameter exhaust. This is one of the most common methods to
increase a vehicle's power and the G35 is not an exception. A larger
diameter exhaust can be installed from the catalytic converter back (so
emissions compliance is retained) which will allow the G35's engine to
make more power, which in turn makes it faster.
2 Replace
the stock manifolds with headers and the stock catalytic converters
with high-flow catalytic converters. Manifolds are relatively
restrictive thanks to their cast design. A set of tubular headers will
get spent exhaust gasses out of the engine more quickly, as will
high-flow catalytic converters.
3 Replace
the air box with a cold air intake. Incoming air is channeled through
an air box before entering the intake. The air box is relatively
restrictive. Replacing the air box with a cold air intake delivers
additional air to the engine thanks to the larger diameter tubing and
large cone filter on the end of it.
4 Install
an intake plenum spacer. The G35's intake manifold volume can be
enlarged with the installation of a spacer. The more air the intake
plenum can hold, the more power the G35's engine can make.
5 Reprogram
the engine's computer. This is another common method to make a G35
faster. The stock settings that control the engine are conservative.
Reprogramming the ECU will allow the engine to receive more air, fuel
and emanate more power.
6 Upgrade
the handling. A faster car is not faster in a straight line, but around
corners as well. A heavy, luxurious car like the G35 in particular will
take very well to a lower, stiffer suspension and will allow it to
corner quicker.
7 Install
performance wheels and tires. Replacing the G35's stock wheels and
tires with lighter aftermarket alloys and stickier tires will help it
handle much better and make it faster overall.