The Ford Performance rear main seal (M-6701-B351) is designed for compatibility with 5.8L / 351W engines, boasting a 1-piece construction that enhances its durability over traditional seals. Despite its resilience, prolonged use in 5.8L engines may eventually lead to leaks. Crafted from OEM rubber construction, this rear main seal promises longevity comparable to the original seal. So, if you're seeking to replace a worn-out rear main seal in your 5.8L / 351W engine, consider acquiring this unit from NPD for a reliable fit and enhanced performance.
Installation Note:
This one piece rear main seal from Ford Performance is designed to be a direct replacement rear main seal for 351W from 7/11/83 - 1997 as well as Ford Performance 351W blocks manufactured after 6/1/93. This seal is also designed to fits Ford Performance blocksM-6010-BOSS35192,M-6010-B35192BB, M-6010-BOSS35195and M-6010-BOSS351BB, M-6010-B302BB.
When planning to remove your transmission, it is advisable to replace the rear main seal with a new unit from Ford Performance. This can be an opportune time to conduct this service on your 5.8L engine, especially when the transmission is already out for clutch replacement or other transmission-related maintenance. By installing a new rear main seal during this process, you can prevent potential leaks and ensure efficient engine operation in the long run.
NPD Part Number : F-6701-9A Manufacturer Reference #'s: Fel-Pro BS 40592,
1965-1974 F100-F350 240
1965-1974 F100-F350 240
1965-1979 F100-F350 300
1965-1979 F100-F350 300
1983-1987 F100-F350 5.8L W, (FROM 7/11/83 TO BEFORE 06/87)
1983-1987 F100-F350 5.8L W, (FROM 7/11/83 TO BEFORE 06/87)
1980-1986 BRONCO 4.9L
1980-1986 BRONCO 4.9L
1983-1987 BRONCO 5.8L W, (FROM 7/11/83 TO BEFORE 06/87)
1983-1987 BRONCO 5.8L W, (FROM 7/11/83 TO BEFORE 06/87)
1987-1992 BRONCO (FROM 6/87), 4.9L
1987-1992 BRONCO (FROM 6/87), 4.9L
1987-1996 F150-F350 (FROM 6/87), 4.9L
1987-1996 F150-F350 (FROM 6/87), 4.9L
0-0 FORD 5.8L / 351W ENGINES FROM 7/11/83 THRU 1997 AND FORD PERFORMANCE 351W BLOCKS MANUFACTURED AFTER 6/1/93
0-0 FORD 5.8L / 351W ENGINES FROM 7/11/83 THRU 1997 AND FORD PERFORMANCE 351W BLOCKS MANUFACTURED AFTER 6/1/93
1980-1986 F100-F350 4.9L
1980-1986 F100-F350 4.9L
WARNING: This product can expose you to chemicals including lead and DEHP, which are 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.
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