{
"lazyNodes": false,
"abFitnotesFlag": false,
"abCrawlReviews": false,
"productOptionsCookie": false,
"orderDelayFlag": false,
"skipSessionCookie": false,
"covidMessage": false,
"fullTitleCookie": false,
"nrLoggerCookie": false,
"checkoutReviewCookie": false,
"productOptionSeqCookie": false,
"maintenanceFlag": false,
"bufferETACookie": false,
"multiShippingDiscountFlag": false,
"newFitmentFlag": false,
"surveyOptInFlag": false,
"crossSellFlag": false,
"skuMappingFlag": false,
"paySplitCookie": false,
"callDisableFlag": false,
"zipPaymentFlag": "u",
"hassleFreeReturn": false,
"lifetimeReplacement": false,
"cpn_off": false
}Need Help? Call Us1-866-529-0412
Guaranteed to Fit1991 Ford F-Super Duty Change Vehicle
MSD® 1991 Ford F-Super Duty - Iridium Series Spark Plug, Set of 4
Tap image and pinch to zoom.
$42.49
$47.57Save: $5.08(11%)
Manufacturer #37204
Guaranteed to Fit1991 Ford F-Super Duty Change Vehicle
Qty:
1
Your Vehicle Fit Details
Vehicle Name
Submodel
Engine
Fitment Information
1991 Ford F-Super Duty
Custom
8 Cyl 7.5L
4 Pack; Plug Type 6IR4Y; 0.035 in. Plug Gap
Highlights
Part:
Brand:
Notes:
5/8 in. hex size; Projected insulator type; Tapered seat style; Iridium power electrode configuration
Series:
Iridium Series
Spark Plug Code:
6IR4Y
Electrode Tip Material:
Iridium Electrode Tip
Quantity Sold:
Set of 4
Warranty:
1-year MSD limited warranty
Prop 65 Warning:
WARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Electrode Core Material:
Copper Electrode Core
Heat Range:
4
Product Fit:
Direct Fit
Reach:
11 mm Reach
Recommended Use:
Performance
Thread Size:
14 mm thread size
Fitnotes:
4 Pack; Plug Type 6IR4Y; 0.035 in. Plug Gap
Vehicle Fitment Information
Vehicle Name
Submodel
Engine
Fitment Information
1967 Buick Electra
Base
8 Cyl 7.0L
-
1967 Buick Electra
Custom
8 Cyl 7.0L
-
1967 Buick Gran Sport
Base
8 Cyl 6.6L
-
1967-1968 Buick Skylark
Base
8 Cyl 6.6L
-
1967-1969 Buick Riviera
Base
8 Cyl 7.0L
-
Page 1 of 514 | Showing 1 - 5 of 2566 results
Product Information
MSD – IRIDIUM PERFORMANCE SPARK PLUGS
These MSD performance spark plugs are made from extra tough and highly conductive Iridium along with a copper core and special ceramic casing to produce a hot spark that also stays cool to avoid detonation. They’re designed specifically to work with high output ignition systems such MSD’s and you can find them on the world’s fastest vehicles. From ignitions to distributors, starters to coils, from spark plugs to plug wires, there’s an MSD product to help you get the most out of your engine.
- Used by top fuel drag cars, off-roaders and stock cars
- Maximizes the power of high output ignitions
- Iridium high-conductivity produces hot ignition spark
- Center ground strap contains Yttrium for its high heat resistance
- Spark isolation is improved thanks to high dielectric-strength ceramics
- Heat-transferring copper core stays cooler to last longer
- Machined electrodes for better flame exposure, improved combustion
Need help?Call our product expert1-866-529-0412
Chat with us
Mondays - Sundays7am - 11pm ET | 4am - 8pm PT
Warranty Policy
Right parts, guaranteed. If you find any defects, let us know within 60 days and we’ll take care of it. Check out our Warranty Policy for more details.
Shipping Policy
We ship fast so you can get on the road that much faster. Check out our Shipping Policy for more details.
Easy Return Policy
We’re only happy if you’re happy. If you’re not entirely satisfied with your order, you may be entitled to a refund. Check out our Return Policy for more details.