NGK KR8DI 4742 Spark Plug

View on

Verify with Amazon ConfirmedFit before buying

Rating

4.2 / 5 Overall
NGK	KR8DI
Brand	Code
4.5 / 5 Materials
Platinum	Iridium
Ground electrode	Center electrode
3.5 / 5 Design
Standard	Fine Wire
Ground type	Center type

Specifications

0.8mm (.031")	8
Gap	Heat range
⌀12mm	1.25mm
Thread diameter	Thread pitch
19mm (3/4")	16mm (5/8")
Reach	Hex size
Gasket	Threaded Stud
Seat	Terminal
1	Non-Projected
Ground count	Projection

Cross-reference and alternatives

Same specs (2)

Products that have identical characteristics that impact interchangability

KR8AI

Iridium-Platinum

-

4.2/ 5

.031"19mm, ⌀12x1.25HR 8

DCPR8EIX

Copper-Iridium

3.8/ 5

.031"19mm, ⌀12x1.25HR 8

Bigger gap (1)

0.1..0.3 mm gap increase for better performance given your ignition system can handle it

VXU24

Iridium-Platinum

-

4.2/ 5

.035"19mm, ⌀12x1.25HR 24

One step colder (3)

Colder spark plugs with same characteristics for moderately tuned engines (75–100 hp increase)

DCPR9EIX

Copper-Iridium

3.8/ 5

.031"19mm, ⌀12x1.25HR 9

KR9E-G

Copper

2.9/ 5

.031"19mm, ⌀12x1.25HR 9

KR9C-G

Copper

2.9/ 5

.031"19mm, ⌀12x1.25HR 9