Select a vehicle to find exact fit parts

Back to vehicles list

Shop By Product Matching "S6"

Choose a Model for your 1978 Mercury

Bobcat Cougar Grand Marquis Marquis Monarch Zephyr

Showing 1 - 10 of 170 products

Sort:

Show:

Image

SKU

Product

Rating

Price

1978 Mercury Bobcat Spark Plug 6 Cyl 2.8L NGK

NGK V-Power Spark Plug
Gap 0.034" OE Equivalent Design
V-Power Spark Plug
Product Attributes:
- Center Electrode Design: Standard
- Center Electrode Insulator Tip Projection:
  - 0.16
  - 4.0
- Washer Included: No
- Electrical Terminal Type: Removable Nut
- Grade Type: Standard Replacement
- Service Number: Tr5
- Ground Electrode Tip Material: Nickel
- Short Style Spark Plug: No
- Skirt: No
- Center Electrode Core Material: Copper
- Part Number: Tr5
- Resistor Type: Yes
- Stock Number: 2238
- Ground Electrode Tip Design: Standard
- Pre-Gap Size:
  - .040
  - 1.0
- Ground Electrode Core Material: Nickel
- Material Grade: Nickel/copper
- Center Electrode Projection: Mid Projection
- Seat Type: Tapered
- Ground Electrode Quantity: 1
- Insulator Material: Ceramic
- Hex Size: 5/8" (16mm)
- Reach:
  - 0.689
  - 17.5
- Center Electrode Tip Material: Nickel
- Skirt Length: 0.0
- Manufacturer Heat Range: 5
- Ground Configuration: J-gap
- Resistance: 5000.0
- Insulator Height:
  - 2.07
  - 52.5
- Thread Diameter:
  - 0.551
  - 14.0
Features:
- COLD-ROLLED THREADS: Prevents cross-threading and damage to cylinder heads
- RECOMMENDED USAGE: Best for vehicles with OE nickel alloy plugs, not recommended on vehicles with factory precious metal plugs
- ACTUAL OE or EQUIVALENT DESIGN: OEM quality construction nickel alloy center electrode with V-groove provides consistent performance
- TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
- NGK's OE CERAMIC TECHNOLOGY: High grade alumina silicate ceramic creates a stronger insulator for optimal dielectric performance
- SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
NGK V-Power spark plugs offer reliable performance and improved ignitability over standard nickel plugs. Engineered specifically for OE applications, the special V-cut nickel alloy center electrode and concave ground electrode of NGK's V-Power spark plug increases ignitability providing quicker starts and smoother idle. NGK's legendary high grade alumina silicate ceramic creates a stronger insulator for optimal dielectric performance. Trivalent metal plating ensures superior anti-corrosion and anti-seizing properties.
Suggested Purchase Quantity: 8
- Most jobs typically require 8 of this item.
This item must be purchased in quantities of 4

Additional Fitment Information:

Vehicle	Block	CC	Engine	CID
1978 - Mercury Bobcat	V	-	6 Cyl 2.8L	171

111 In Stock

Limited-Time Offer

$10.05 USD

$12.06 USD


Brand	NGK
Part #	N122238
Condition	New
Warehouse	B

1978 Mercury Zephyr Spark Plug 4 Cyl 2.3L NGK

NGK V-Power Spark Plug
Gap 0.034" OE Equivalent Design
V-Power Spark Plug
Product Attributes:
- Center Electrode Design: Standard
- Center Electrode Insulator Tip Projection:
  - 0.16
  - 4.0
- Washer Included: No
- Electrical Terminal Type: Removable Nut
- Grade Type: Standard Replacement
- Service Number: Tr5
- Ground Electrode Tip Material: Nickel
- Short Style Spark Plug: No
- Skirt: No
- Center Electrode Core Material: Copper
- Part Number: Tr5
- Resistor Type: Yes
- Stock Number: 2238
- Ground Electrode Tip Design: Standard
- Pre-Gap Size:
  - .040
  - 1.0
- Ground Electrode Core Material: Nickel
- Material Grade: Nickel/copper
- Center Electrode Projection: Mid Projection
- Seat Type: Tapered
- Ground Electrode Quantity: 1
- Insulator Material: Ceramic
- Hex Size: 5/8" (16mm)
- Reach:
  - 0.689
  - 17.5
- Center Electrode Tip Material: Nickel
- Skirt Length: 0.0
- Manufacturer Heat Range: 5
- Ground Configuration: J-gap
- Resistance: 5000.0
- Insulator Height:
  - 2.07
  - 52.5
- Thread Diameter:
  - 0.551
  - 14.0
Features:
- COLD-ROLLED THREADS: Prevents cross-threading and damage to cylinder heads
- RECOMMENDED USAGE: Best for vehicles with OE nickel alloy plugs, not recommended on vehicles with factory precious metal plugs
- ACTUAL OE or EQUIVALENT DESIGN: OEM quality construction nickel alloy center electrode with V-groove provides consistent performance
- TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
- NGK's OE CERAMIC TECHNOLOGY: High grade alumina silicate ceramic creates a stronger insulator for optimal dielectric performance
- SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
NGK V-Power spark plugs offer reliable performance and improved ignitability over standard nickel plugs. Engineered specifically for OE applications, the special V-cut nickel alloy center electrode and concave ground electrode of NGK's V-Power spark plug increases ignitability providing quicker starts and smoother idle. NGK's legendary high grade alumina silicate ceramic creates a stronger insulator for optimal dielectric performance. Trivalent metal plating ensures superior anti-corrosion and anti-seizing properties.
Suggested Purchase Quantity: 8
- Most jobs typically require 8 of this item.
This item must be purchased in quantities of 4

This Part Fits the Following OEM/Substitute Numbers:

104, 104BP, 104DP2, 105, 106, 106BP, 1765180, 1835078T, 20, 2238, 241229617, 2R44LTS, 3243, 3244, 3245, 3246, 3565, 3724...VIEW MORE

Additional Fitment Information:

Vehicle	Block	CC	Engine	CID
1978 - Mercury Zephyr	L	-	4 Cyl 2.3L	140

111 In Stock

Limited-Time Offer

$10.05 USD

$12.06 USD


Brand	NGK
Part #	N122238
Condition	New
Warehouse	B

1978 Mercury Bobcat Spark Plug 6 Cyl 2.8L NGK

NGK Iridium IX Spark Plug
Gap 0.034"
Iridium IX Spark Plug
Product Attributes:
- Center Electrode Design: Fine Wire
- Center Electrode Insulator Tip Projection:
  - 0.16
  - 4.0
- Washer Included: No
- Electrical Terminal Type: Non-removable Nut
- Grade Type: Performance
- Service Number: Tr5ix
- Ground Electrode Tip Material: Nickel
- Short Style Spark Plug: No
- Skirt: No
- Center Electrode Core Material: Copper
- Part Number: Tr5ix
- Resistor Type: Yes
- Stock Number: 7397
- Ground Electrode Tip Design: Taper Cut
- Pre-Gap Size:
  - .040
  - 1.0
- Ground Electrode Core Material: Nickel
- Material Grade: Iridium
- Center Electrode Projection: Mid Projection
- Seat Type: Tapered
- Ground Electrode Quantity: 1
- Insulator Material: Ceramic
- Hex Size: 5/8" (16mm)
- Reach:
  - 0.689
  - 17.5
- Center Electrode Tip Material: Iridium
- Skirt Length: 0.0
- Manufacturer Heat Range: 5
- Ground Configuration: J-gap
- Resistance: 5000.0
- Insulator Height:
  - 2.07
  - 52.5
- Thread Diameter:
  - 0.551
  - 14.0
Features:
- SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
- TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
- IRIDIUM ALLOY CENTER ELECTRODE: Iridium's density (6x that of platinum) and extremely high melting point is perfect for modern high efficiency engines
- TAPERED CUT GROUND ELECTRODE: Reduced quenching design produces outstanding ignitability, improved acceleration, fuel efficiency and durability
- SINGLE IRIDIUM TIP: Fine wire 0.6 millimeter iridium tip center electrode ensures high durability and a consistently stable spark
- RECOMMENDED USAGE: Modified or high performance applications, or as an upgrade to OE nickel alloy spark plugs
NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode's durability is six times harder than platinum. Iridium alloy's extremely high melting point is perfect for today's engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug.
Suggested Purchase Quantity: 8
- Most jobs typically require 8 of this item.
This item must be purchased in quantities of 4

This Part Fits the Following OEM/Substitute Numbers:

12571533, 1765290, 1835350T, 1835384T, 1835422T, 241-904, 241-906, 241-910, 25164640, 3, 4011, 41-900, 41-904, 41-906, 41-907, 41-910, 41-986, 4205...VIEW MORE

Additional Fitment Information:

Vehicle	Block	CC	Engine	CID
1978 - Mercury Bobcat	V	-	6 Cyl 2.8L	171

80 In Stock

Limited-Time Offer

$19.49 USD

$23.39 USD


Brand	NGK
Part #	N127397
Condition	New
Warehouse	B

1978 Mercury Grand Marquis Engine Coolant Bypass Hose 8 Cyl 5.8L Dayco

Curved Radiator Hose
Product Attributes:
- : .63
- Trunk Height: 5 1/2
- Color: Black
- Contains Heat Shield: N
- Centerline Length: 5.50
- End 1 Inside Diameter:
  - .75
  - 5/8
- Hose Type: Dual I.d. Hose
- SAE Specification: Sae J20r4 Class D-1, Sae J1684 Type Ec
- Contains Protective Sleeve: N
- Material: Epdm
- End 2 Inside Diameter: 3/4

This Part Fits the Following OEM/Substitute Numbers:

10170732, 11022, 14152S, 14213S, 19022, 20662, 27146-01P00, 3009, 43726, 63726, 642209, 7447, A70646, BH1511, BP726, BP8, BP867, C0662...VIEW MORE

Additional Fitment Information:

Vehicle	Block	CC	Engine	CID
1978 - Mercury Grand Marquis	V	5753	8 Cyl 5.8L	351

2 In Stock

Limited-Time Offer

$29.36 USD

$35.23 USD


Brand	Dayco
Part #	D3570646
Condition	New
Warehouse	B

1978 Mercury Cougar Engine Coolant Bypass Hose 8 Cyl 5.0L Dayco

Cut to Fit
Curved Radiator Hose
Product Attributes:
- : .63
- Trunk Height: 5 1/2
- Color: Black
- Contains Heat Shield: N
- Centerline Length: 5.50
- End 1 Inside Diameter:
  - .75
  - 5/8
- Hose Type: Dual I.d. Hose
- SAE Specification: Sae J20r4 Class D-1, Sae J1684 Type Ec
- Contains Protective Sleeve: N
- Material: Epdm
- End 2 Inside Diameter: 3/4

Additional Fitment Information:

Vehicle	Block	CC	Engine	CID
1978 - Mercury Cougar	V	-	8 Cyl 5.0L	302

2 In Stock

Limited-Time Offer

$29.36 USD

$35.23 USD


Brand	Dayco
Part #	D3570646
Condition	New
Warehouse	B

1978 Mercury Bobcat Accessory Drive Belt - Power Steering 6 Cyl 2.8L Dayco

Product Attributes:
- Top Width: .44
- Outside Circumference:
  - 1157.48
  - 45.57
- Color: Black
- Banded Belt: N
- Standards: Sae J636, Sae J637
- Effective Length:
  - 1143.00
  - 45
- Belt Construction: Bottom Cog
- Minimum Operating Temperature:
  - -35
  - -37.2
- Material: Synthetic Rubber Compound
- Maximum Operating Temperature:
  - 175
  - 79.4

Additional Fitment Information:

Vehicle	Block	CC	Position	Engine	CID
1978 - Mercury Bobcat	V	-	Power Steering	6 Cyl 2.8L	171

17 In Stock

Limited-Time Offer

$31.47 USD

$37.76 USD


Brand	Dayco
Part #	D3515450
Condition	New
Warehouse	B

1978 Mercury Zephyr Accessory Drive Belt - Fan and Alternator 4 Cyl 2.3L Dayco

with 70 Amp Alternator
Product Attributes:
- Top Width: .44
- Outside Circumference:
  - 1157.48
  - 45.57
- Color: Black
- Banded Belt: N
- Standards: Sae J636, Sae J637
- Effective Length:
  - 1143.00
  - 45
- Belt Construction: Bottom Cog
- Minimum Operating Temperature:
  - -35
  - -37.2
- Material: Synthetic Rubber Compound
- Maximum Operating Temperature:
  - 175
  - 79.4

This Part Fits the Following OEM/Substitute Numbers:

10034695, 10A1145, 11720-P801001, 118671, 1264036, 13-452, 13-542, 13450, 13451, 1374979, 14017797, 14054477, 14064191, 14072731, 14092344, 15-450, 15-456, 15447M...VIEW MORE

Additional Fitment Information:

Vehicle	Block	CC	Position	Engine	Steering System	CID
1978 - Mercury Zephyr	L	-	Fan and Alternator	4 Cyl 2.3L	Manual	140

17 In Stock

Limited-Time Offer

$31.47 USD

$37.76 USD


Brand	Dayco
Part #	D3515450
Condition	New
Warehouse	B

1978 Mercury Marquis Spark Plug 8 Cyl 5.8L NGK

NGK V-Power Spark Plug
Gap 0.044" OE Equivalent Design
V-Power Spark Plug
Product Attributes:
- Center Electrode Design: Standard
- Center Electrode Insulator Tip Projection:
  - 0.16
  - 4.0
- Washer Included: No
- Electrical Terminal Type: Non-removable Nut
- Grade Type: Standard Replacement
- Service Number: Ur4
- Ground Electrode Tip Material: Nickel
- Short Style Spark Plug: No
- Skirt: No
- Center Electrode Core Material: Copper
- Part Number: Ur4
- Resistor Type: Yes
- Stock Number: 6630
- Ground Electrode Tip Design: Standard
- Pre-Gap Size:
  - .040
  - 1.0
- Ground Electrode Core Material: Nickel
- Material Grade: Nickel/copper
- Center Electrode Projection: Mid Projection
- Seat Type: Tapered
- Ground Electrode Quantity: 1
- Insulator Material: Ceramic
- Hex Size: 5/8" (16mm)
- Reach:
  - 0.460
  - 11.2
- Center Electrode Tip Material: Nickel
- Skirt Length: 0.0
- Manufacturer Heat Range: 4
- Ground Configuration: J-gap
- Resistance: 5000.0
- Insulator Height:
  - 2.19
  - 55.5
- Thread Diameter:
  - 0.551
  - 14.0
Features:
- TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
- COLD-ROLLED THREADS: Prevents cross-threading and damage to cylinder heads
- SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
- NGK's OE CERAMIC TECHNOLOGY: High grade alumina silicate ceramic creates a stronger insulator for optimal dielectric performance
- RECOMMENDED USAGE: Best for vehicles with OE nickel alloy plugs, not recommended on vehicles with factory precious metal plugs
- ACTUAL OE or EQUIVALENT DESIGN: OEM quality construction nickel alloy center electrode with V-groove provides consistent performance
NGK V-Power spark plugs offer reliable performance and improved ignitability over standard nickel plugs. Engineered specifically for OE applications, the special V-cut nickel alloy center electrode and concave ground electrode of NGK's V-Power spark plug increases ignitability providing quicker starts and smoother idle. NGK's legendary high grade alumina silicate ceramic creates a stronger insulator for optimal dielectric performance. Trivalent metal plating ensures superior anti-corrosion and anti-seizing properties.
Suggested Purchase Quantity: 8
- Most jobs typically require 8 of this item.
This item must be purchased in quantities of 4

This Part Fits the Following OEM/Substitute Numbers:

1052895W, 15, 16, 1765179, 18, 1835800T, 1835906T, 18C2, 18S, 19, 25, 25BP, 25C2, 25DP2, 25S, 26, 2R45TS, 2R46TS...VIEW MORE

Additional Fitment Information:

Vehicle	Block	CC	Engine	CID
1978 - Mercury Marquis	V	5753	8 Cyl 5.8L	351

107 In Stock

Limited-Time Offer

$10.05 USD

$12.06 USD


Brand	NGK
Part #	N126630
Condition	New
Warehouse	B

1978 Mercury Monarch Accessory Drive Belt - Air Conditioning 6 Cyl 4.1L Dayco

Product Attributes:
- Top Width: .53
- Outside Circumference:
  - 37.27
  - 946.66
- Color: Black
- Banded Belt: N
- Standards: Sae J636, Sae J637
- Effective Length:
  - 37
  - 939.80
- Belt Construction: Bottom Cog
- Minimum Operating Temperature:
  - -35
  - -37.2
- Material: Synthetic Rubber Compound
- Maximum Operating Temperature:
  - 175
  - 79.4

This Part Fits the Following OEM/Substitute Numbers:

02117-92523, 11502336, 11720-V5001, 11720-V5012, 11920-05D01, 11920-J7525, 11920-N9505, 11920-P30101, 11920-W3200, 12.5X940, 13A0940, 141-1237, 16-372, 16.97-07553, 16370, 17-372, 17370, 17371...VIEW MORE

Additional Fitment Information:

Vehicle	Block	CC	Position	Engine	CID
1978 - Mercury Monarch	L	-	Air Conditioning	6 Cyl 4.1L	250

5 In Stock

Limited-Time Offer

$34.23 USD

$41.08 USD


Brand	Dayco
Part #	D3517370
Condition	New
Warehouse	B

1978 Mercury Grand Marquis Spark Plug 8 Cyl 6.6L Champion

Champion Copper Plus- Boxed - RV17YC
Gap 0.050in OE Type ; Plug Type RV17YC
Champion Copper Plus 25 Spark Plug (Carton of 4)
Copper Plus
Product Attributes:
- Hex Size:
  - 0.625
  - 15.880
- Reach: 0.441
- Center Electrode Tip Material: Nickel
- Seat Type: Tapered
- Electrical Terminal Type: Removable Nut
- Manufacturer Heat Range: 17
- Pre-Gap Size:
  - 0.035
  - 0.90
- Classification: Champion Copper Plus
- Ground Electrode Core Material: Nickel
- Insulator Height: 0.12
- Plug Type: Rv17yc
Dependable performance. This Champion® spark plug features a copper core electrode that provides increased conductivity and heat control for good overall wear.
Suggested Purchase Quantity: 8
- Most jobs typically require 8 of this item.
This item must be purchased in quantities of 8