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Cometic Extreme Sealing Technology (EST) Motor Only Gasket Set - C9891

  • Part #:
    263396
  • Manufacturer Part #:
    C9891

MSRP Price: $137.95

Our Price: $119.88

You Save:
$18.07 (13%)
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Overview of Cometic Extreme Sealing Technology (EST) Motor Only Gasket Set - C9891

  • EST kits ensure critical seal and superior durability that meets and exceed OE specifications
  • MLS (multi-layer-steel) head gaskets are ideal for any combination of head and cylinder materials, comprised of two embossed viton coated stainless steel outer layers and variable stainless center layer
  • The variable center layer allows us to create multiple gasket thickness options, no re-torque is required after initial torque set
  • Rubber coated single layer steel base gaskets are viton rubber coated with a steel core
  • AFM material engine cover gaskets are made for a chemically blown compounded nitrile synthetic rubber that is bonded to an aluminum core.
  • AFM has a temperature resistance of over 250 degrees F and an 85 percent recovery while maintaining a strong torque retention, they also install dry and do not require a re-torque
  • Viton valve stem seals are made from hi-temperature Flouroviton with Teflon to prolong valve stem life and have a spring on the wiper to maintain a positive seal
  • Race style exhaust gasket that will not fray into the port
  • Copper washers and Viton o-rings are used to seal drain plugs and engine covers with stock o-ring seals


  • Included Items:
    (2) Base gaskets
    (4) Engine case gaskets
    (2) Race style exhaust gaskets
    (2) Head gaskets
    (1) Pump body oil seal
    (1) Cam cover seal
    (1) Sprocket shaft oil seal
    (7) Cover/overflow oil seal
    (1) Starter motor shaft oil seal
    (1) Inner chain housing seal
    (1) Shifter shaft oil seal
    (1) Trans. to starter oil seal
    (1) Starter shaft oil seal
    (1) Inner primary cover oil seal
    (2) Umbrella valve rocker cover seal
    (14) Assorted o-rings
    (4) Viton o-rings
    (4) Valve stem seals
    (8) Vulcanized stud washers
    (8) Copper washers
    (2) Rocker box gaskets
    (2) Oil pump/pan gaskets
    (2) Inner rocker seals
    (2) Upper rocker box seals
    (2) Lower rocker box seals
    (2) Intake manifold gasket seals
    (1) Carb seal o-ring
    (2) Carb gaskets
    (2) Intake reed gaskets

Specs for Cometic Extreme Sealing Technology (EST) Motor Only Gasket Set - C9891

Type Motor Gasket
Type Full Engine Gasket Kit
Units Set
Weight 1.68 lbs

Cross reference number(s):

09340732

Specs for Cometic Extreme Sealing Technology (EST) Motor Only Gasket Set - C9891

Type Motor Gasket
Type Full Engine Gasket Kit
Units Set
Weight 1.68 lbs

Fitment for Cometic Extreme Sealing Technology (EST) Motor Only Gasket Set - C9891

See if this part fits your ride

Part 263396 fits the following machines

Harley-Davidson
  • 1984 Harley-Davidson Disc Glide - FXRDG
  • 1991 Harley-Davidson Dyna Sturgis - FXDB
  • 1985 Harley-Davidson Electra Glide - FLH
  • 1984 Harley-Davidson Electra Glide - FLH
  • 1987 Harley-Davidson Electra Glide - FLHT
  • 1986 Harley-Davidson Electra Glide - FLHT
  • 1985 Harley-Davidson Electra Glide - FLHT
  • 1991 Harley-Davidson Electra Glide Classic - FLHTC
  • 1990 Harley-Davidson Electra Glide Classic - FLHTC
  • 1989 Harley-Davidson Electra Glide Classic - FLHTC
  • 1988 Harley-Davidson Electra Glide Classic - FLHTC
  • 1987 Harley-Davidson Electra Glide Classic - FLHTC
  • 1986 Harley-Davidson Electra Glide Classic - FLHTC
  • 1985 Harley-Davidson Electra Glide Classic - FLHTC
  • 1984 Harley-Davidson Electra Glide Classic - FLHTC
  • 1985 Harley-Davidson Electra Glide Special - FLHX
  • 1984 Harley-Davidson Electra Glide Special - FLHX
  • 1993 Harley-Davidson Electra Glide Sport - FLHS
  • 1992 Harley-Davidson Electra Glide Sport - FLHS
  • 1991 Harley-Davidson Electra Glide Sport - FLHS
  • 1990 Harley-Davidson Electra Glide Sport - FLHS
  • 1989 Harley-Davidson Electra Glide Sport - FLHS
  • 1988 Harley-Davidson Electra Glide Sport - FLHS
  • 1987 Harley-Davidson Electra Glide Sport - FLHS
  • 1984 Harley-Davidson Electra Glide Sport - FLHS
  • 1998 Harley-Davidson Electra Glide Standard - FLHT
  • 1997 Harley-Davidson Electra Glide Standard - FLHT
  • 1996 Harley-Davidson Electra Glide Standard - FLHT
  • 1995 Harley-Davidson Electra Glide Standard - FLHT
  • 1989 Harley-Davidson Electra Glide Ultra Classic - FLHTCU
  • 1990 Harley-Davidson Heritage Softail - FLST
  • 1989 Harley-Davidson Heritage Softail - FLST
  • 1988 Harley-Davidson Heritage Softail - FLST
  • 1987 Harley-Davidson Heritage Softail - FLST
  • 1986 Harley-Davidson Heritage Softail - FLST
  • 1991 Harley-Davidson Heritage Softail Classic - FLSTC
  • 1990 Harley-Davidson Heritage Softail Classic - FLSTC
  • 1989 Harley-Davidson Heritage Softail Classic - FLSTC
  • 1988 Harley-Davidson Heritage Softail Classic - FLSTC
  • 1985 Harley-Davidson Low Glide - FXRS
  • 1984 Harley-Davidson Low Glide - FXRS
  • 1985 Harley-Davidson Low Glide Custom - FXRC
  • 1989 Harley-Davidson Low Rider - FXRS
  • 1988 Harley-Davidson Low Rider - FXRS
  • 1987 Harley-Davidson Low Rider - FXRS
  • 1986 Harley-Davidson Low Rider - FXRS
  • 1985 Harley-Davidson Low Rider - FXSB
  • 1987 Harley-Davidson Low Rider Chrome - FXRC
  • 1991 Harley-Davidson Low Rider Convertible - FXRS-CONV
  • 1990 Harley-Davidson Low Rider Convertible - FXRS-CONV
  • 1991 Harley-Davidson Low Rider Custom - FXLR
  • 1990 Harley-Davidson Low Rider Custom - FXLR
  • 1988 Harley-Davidson Low Rider Custom - FXLR
  • 1987 Harley-Davidson Low Rider Custom - FXLR
  • 1991 Harley-Davidson Low Rider Sport - FXRS-SP
  • 1990 Harley-Davidson Low Rider Sport - FXRS-SP
  • 1988 Harley-Davidson Low Rider Sport - FXRS-SP
  • 1987 Harley-Davidson Low Rider Sport - FXRS-SP
  • 1986 Harley-Davidson Low Rider Sport - FXRS-SP
  • 1998 Harley-Davidson Road Glide Injected - FLTR I
  • 1989 Harley-Davidson Softail - FXST
  • 1988 Harley-Davidson Softail - FXST
  • 1987 Harley-Davidson Softail - FXST
  • 1986 Harley-Davidson Softail - FXST
  • 1991 Harley-Davidson Softail Custom - FXSTC
  • 1990 Harley-Davidson Softail Custom - FXSTC
  • 1991 Harley-Davidson Softail Fat Boy - FLSTF
  • 1990 Harley-Davidson Softail Fat Boy - FLSTF
  • 1991 Harley-Davidson Softail Springer - FXSTS
  • 1990 Harley-Davidson Softail Springer - FXSTS
  • 1989 Harley-Davidson Softail Springer - FXSTS
  • 1988 Harley-Davidson Softail Springer - FXSTS
  • 1991 Harley-Davidson Sport Glide - FXRT
  • 1990 Harley-Davidson Sport Glide - FXRT
  • 1989 Harley-Davidson Sport Glide - FXRT
  • 1988 Harley-Davidson Sport Glide - FXRT
  • 1987 Harley-Davidson Sport Glide - FXRT
  • 1986 Harley-Davidson Sport Glide - FXRT
  • 1985 Harley-Davidson Sport Glide - FXRT
  • 1984 Harley-Davidson Sport Glide - FXRT (Early Model)
  • 1984 Harley-Davidson Sport Glide - FXRT (Late Model)
  • 1986 Harley-Davidson Sport Glide Grand Touring - FXRD
  • 1984 Harley-Davidson Super Glide - FXE
  • 1991 Harley-Davidson Super Glide - FXR
  • 1990 Harley-Davidson Super Glide - FXR
  • 1989 Harley-Davidson Super Glide - FXR
  • 1988 Harley-Davidson Super Glide - FXR
  • 1987 Harley-Davidson Super Glide - FXR
  • 1986 Harley-Davidson Super Glide - FXR
  • 1985 Harley-Davidson Super Glide - FXR
  • 1984 Harley-Davidson Super Glide - FXR
  • 1985 Harley-Davidson Super Glide Fat Bob - FXEF
  • 1991 Harley-Davidson Tour Glide Classic - FLTC
  • 1990 Harley-Davidson Tour Glide Classic - FLTC
  • 1989 Harley-Davidson Tour Glide Classic - FLTC
  • 1988 Harley-Davidson Tour Glide Classic - FLTC
  • 1987 Harley-Davidson Tour Glide Classic - FLTC
  • 1986 Harley-Davidson Tour Glide Classic - FLTC
  • 1985 Harley-Davidson Tour Glide Classic - FLTC
  • 1984 Harley-Davidson Tour Glide Classic - FLTC (Early Model)
  • 1984 Harley-Davidson Tour Glide Classic - FLTC (Late Model)
  • 1991 Harley-Davidson Tour Glide Ultra Classic - FLTCU
  • 1990 Harley-Davidson Tour Glide Ultra Classic - FLTCU
  • 1989 Harley-Davidson Tour Glide Ultra Classic - FLTCU
  • 1996 Harley-Davidson Tour Glide Ultra Classic Injected - FLTCU I
  • 1986 Harley-Davidson Wide Glide - FXWG
  • 1985 Harley-Davidson Wide Glide - FXWG
  • 1984 Harley-Davidson Wide Glide - FXWG
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Instructions and Manuals for Cometic Extreme Sealing Technology (EST) Motor Only Gasket Set - C9891

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