NGK R5724-8 Spark Plug

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Rating

3.1 / 5 Overall
NGK	R5724-8
Brand	Code
3.0 / 5 Materials
Copper	Copper
Ground electrode	Center electrode
3.3 / 5 Design
Standard	V-Cut
Ground type	Center type

Specifications

0.5mm (.020")	8
Gap	Heat range
⌀14mm	1.25mm
Thread diameter	Thread pitch
18mm (.709")	16mm (5/8")
Reach	Hex size
Tapered	Solid
Seat	Terminal
1	Non-Projected
Ground count	Projection

Cross-reference and alternatives

Cross-reference (6)

Alternative spark plugs found in cross-reference docs provided by manufacturers

IT24

Copper-Iridium

4.3/ 5

.031"17.5mm, ⌀14x1.25HR 24

C61

Copper

3.5/ 5

.026"19mm, ⌀14x1.25HR 61

S61YC

Copper

3.3/ 5

.026"17.5mm, ⌀14x1.25HR 61

AR474

Copper

3.3/ 5

.024"17.5mm, ⌀14x1.25HR 3

AR94

Copper

3.3/ 5

.024"17.5mm, ⌀14x1.25HR 4

S63YC

Copper

3.3/ 5

.026"17.5mm, ⌀14x1.25HR 63

Deep reference (9)

A second level of cross-reference: if A=B and B=C, then A=C

R7434-8

Iridium-Platinum

4.5/ 5

.028"19mm, ⌀14x1.25HR 8

TR8IX

Copper-Iridium

3.8/ 5

.039"18mm, ⌀14x1.25HR 8

AR2593

Copper

3.3/ 5

.024"19mm, ⌀14x1.25HR 2

AR3934

Copper

3.3/ 5

.024"19mm, ⌀14x1.25HR 4

AR94

Copper

3.3/ 5

.024"17.5mm, ⌀14x1.25HR 4

S61C

Copper

3.3/ 5

.024"17.5mm, ⌀14x1.25HR 61

S61YC

Copper

3.3/ 5

.026"17.5mm, ⌀14x1.25HR 61

B8EFS

Copper

2.9/ 5

.028"18mm, ⌀14x1.25HR 8

B8EFS

Copper

2.9/ 5

.028"18mm, ⌀14x1.25HR 8

One step colder (1)

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

R5724-9

Copper

-

3.1/ 5

.020"18mm, ⌀14x1.25HR 9

Two steps colder (1)

Two steps colder spark plugs with same characteristics for heavily modified engines (150-200 hp increase)

R5724-10

Copper

-

3.1/ 5

.020"18mm, ⌀14x1.25HR 10