81
Does the engine need to be specially
set when fitting ?
No. The plugs can just replace the ones
you take out.
How do I select the correct heat-range when fitting
to my vehicle?
In ordinary cars, use a spark plug with the same heat
range as a normal spark plug. In highly tuned vehicles,
select a heat range to suit the tuning level of the engine.
(Ordinarily, the heat range of a highly tuned engine tends to be colder.)
Refer to the following table to compare the heat range of the
and other spark plugs.
The itself has a low required voltage and high ignitability
and is able to draw out the power of an engine.
The superb performance of is obtained merely by installing
them in your vehicle. And, of course, there is no need for special tuning.
8
12, 11
5
16
7, 6
10, 9
6
20
5
8, 7
7
22
4
8
24
3
4, 59
9
27
57
9.5
29
10.5
32
2
55
10
31
11
34
BOSCH
CHAMPION
NGK
DENSO
53
11.5
35
6,
63, 61
