NGK TR6IX 3689 Spark Plug

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Rating

3.8 / 5 Overall
NGK	TR6IX
Brand	Code
4.0 / 5 Materials
Copper	Iridium
Ground electrode	Center electrode
3.5 / 5 Design
Standard	Fine Wire
Ground type	Center type

Specifications

1mm (.039")	6
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 (5)

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

IT20TT

Iridium-Platinum

4.7/ 5

.039"17.5mm, ⌀14x1.25HR 20

HR6KII33X

Iridium

4.5/ 5

.043"17.5mm, ⌀14x1.25HR 6

IT20

Copper-Iridium

4.3/ 5

.043"17.5mm, ⌀14x1.25HR 20

VT20

Iridium-Platinum

4.2/ 5

.043"17.5mm, ⌀14x1.25HR 20

XP103

Iridium-Platinum

4.2/ 5

.050"17.5mm, ⌀14x1.25HR 1

Deep reference (57)

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

IT22

Copper-Iridium

4.3/ 5

.031"17.5mm, ⌀14x1.25HR 22

ITR6G9

Iridium-Platinum

4.2/ 5

.035"17.5mm, ⌀14x1.25HR 6

TR5AI-13

Iridium-Platinum

4.2/ 5

.050"18mm, ⌀14x1.25HR 5

XP104

Iridium-Platinum

4.2/ 5

.050"17.5mm, ⌀14x1.25HR 2

XP605

Iridium-Platinum

4.2/ 5

.059"17.5mm, ⌀14x1.25HR 3

RS8WYPB5

Iridium-Platinum

4.2/ 5

.049"17.5mm, ⌀14x1.25HR 8

TR6AP-13

Platinum

-

3.8/ 5

.050"18mm, ⌀14x1.25HR 6

LTR6IX-11

Copper-Iridium

-

3.8/ 5

.043"25mm, ⌀14x1.25HR 6

TR5-1IX

Copper-Iridium

-

3.8/ 5

.039"18mm, ⌀14x1.25HR 5

TR5-1IX

Copper-Iridium

-

3.8/ 5

.039"18mm, ⌀14x1.25HR 5

TR6GP

Copper-Platinum

3.5/ 5

.039"18mm, ⌀14x1.25HR 6

TR55-1VX

Copper-Platinum

3.5/ 5

.059"18mm, ⌀14x1.25HR 5

TR55VX

Copper-Platinum

3.5/ 5

.059"18mm, ⌀14x1.25HR 5

TR6GP

Copper-Platinum

3.5/ 5

.039"18mm, ⌀14x1.25HR 6

APP5144

Platinum

3.5/ 5

.055"18mm, ⌀14x1.25HR 2

TR55-1VX

Copper-Platinum

3.5/ 5

.059"18mm, ⌀14x1.25HR 5

TR55VX

Copper-Platinum

3.5/ 5

.059"18mm, ⌀14x1.25HR 5

TR6GP

Copper-Platinum

3.5/ 5

.039"18mm, ⌀14x1.25HR 6

APP5144

Platinum

3.5/ 5

.055"18mm, ⌀14x1.25HR 2

HGR8DQP

Copper-Platinum

3.5/ 5

.063"17.5mm, ⌀14x1.25HR 8

242240519

Copper-Silver

3.3/ 5

.024"17.5mm, ⌀14x1.25HR 6

S9YC

Copper

3.3/ 5

.026"17.5mm, ⌀14x1.25HR 9

242240519

Copper-Silver

3.3/ 5

.024"17.5mm, ⌀14x1.25HR 6

S9YC

Copper

3.3/ 5

.026"17.5mm, ⌀14x1.25HR 9

242240519

Copper-Silver

3.3/ 5

.024"17.5mm, ⌀14x1.25HR 6

AP5143

Copper-Platinum

3.2/ 5

.055"18mm, ⌀14x1.25HR 1

HGR7KQC

Copper

3.2/ 5

.063"17.5mm, ⌀14x1.25HR 7

HGR7KQC

Copper

3.2/ 5

.063"17.5mm, ⌀14x1.25HR 7

AP5143

Copper-Platinum

3.2/ 5

.055"18mm, ⌀14x1.25HR 1

TR5-1

Copper

3.1/ 5

.039"18mm, ⌀14x1.25HR 5

TR6

Copper

3.1/ 5

.039"18mm, ⌀14x1.25HR 6

TR5-1

Copper

3.1/ 5

.039"18mm, ⌀14x1.25HR 5

TR6

Copper

3.1/ 5

.039"18mm, ⌀14x1.25HR 6

BPR6EFS

Copper

2.9/ 5

.031"18mm, ⌀14x1.25HR 6

BU6EFSZ

Copper

2.9/ 5

.026"18mm, ⌀14x1.25HR 6

BUR6EFSZ

Copper

2.9/ 5

.031"18mm, ⌀14x1.25HR 6

103

Copper

2.9/ 5

.050"17.5mm, ⌀14x1.25HR 1

104

Copper

2.9/ 5

.050"17.5mm, ⌀14x1.25HR 2

2544

Copper

2.9/ 5

.045"18mm, ⌀14x1.25HR 2

5143

Copper

2.9/ 5

.055"18mm, ⌀14x1.25HR 1

5144

Copper

2.9/ 5

.055"18mm, ⌀14x1.25HR 2

764

Copper

2.9/ 5

.045"17.5mm, ⌀14x1.25HR 2

985

Copper

2.9/ 5

.035"19mm, ⌀14x1.25HR 4

RS10LC

Copper

2.9/ 5

.043"21mm, ⌀14x1.25HR 10

RS9YC

Copper

2.9/ 5

.035"17.5mm, ⌀14x1.25HR 9

BPR6EFS

Copper

2.9/ 5

.031"18mm, ⌀14x1.25HR 6

BU6EFSZ

Copper

2.9/ 5

.026"18mm, ⌀14x1.25HR 6

BUR6EFSZ

Copper

2.9/ 5

.031"18mm, ⌀14x1.25HR 6

103

Copper

2.9/ 5

.050"17.5mm, ⌀14x1.25HR 1

104

Copper

2.9/ 5

.050"17.5mm, ⌀14x1.25HR 2

2544

Copper

2.9/ 5

.045"18mm, ⌀14x1.25HR 2

5143

Copper

2.9/ 5

.055"18mm, ⌀14x1.25HR 1

5144

Copper

2.9/ 5

.055"18mm, ⌀14x1.25HR 2

764

Copper

2.9/ 5

.045"17.5mm, ⌀14x1.25HR 2

985

Copper

2.9/ 5

.035"19mm, ⌀14x1.25HR 4

RS10LC

Copper

2.9/ 5

.043"21mm, ⌀14x1.25HR 10

RS9YC

Copper

2.9/ 5

.035"17.5mm, ⌀14x1.25HR 9

Same specs (2)

Products that have identical characteristics that impact interchangability

TR6GP

Copper-Platinum

3.5/ 5

.039"18mm, ⌀14x1.25HR 6

TR6

Copper

3.1/ 5

.039"18mm, ⌀14x1.25HR 6

Bigger gap (2)

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

PTR6D-13

Platinum

-

3.8/ 5

.050"18mm, ⌀14x1.25HR 6

TR6AP-13

Platinum

-

3.8/ 5

.050"18mm, ⌀14x1.25HR 6

One step colder (1)

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

TR7IX

Copper-Iridium

-

3.8/ 5

.039"18mm, ⌀14x1.25HR 7

Two steps colder (1)

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

TR8IX

Copper-Iridium

-

3.8/ 5

.039"18mm, ⌀14x1.25HR 8