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Description
Cometic EVO Big Twin 84-91 Upper Rock Rubber Gasket 5PkToday's lightweight engines are producing more horsepower, higher cylinder pressures, clamp loads and extreme temperatures. Our commitment is to provide innovative, quality gaskets while maximizing your engine's power and performance. Cometic's gaskets are proudly made in the USA with materials manufactured on American soil. We are constantly updating and adding models to our ever growing library of gaskets for Powersports, Street Bikes, Snowmobiles,
Today's lightweight engines are producing more horsepower, higher cylinder pressures, clamp loads and extreme temperatures. Our commitment is to provide innovative, quality gaskets while maximizing your engine's power and performance. Cometic's gaskets are proudly made in the USA with materials manufactured on American soil. We are constantly updating and adding models to our ever growing library of gaskets for Powersports, Street Bikes, Snowmobiles, Harley-Davidson and V-Twin applications.This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1984,1987-1991 | Harley-Davidson | FLHS Electra Glide Sport | Base |
| 1986-1987 | Harley-Davidson | FLHT Electra Glide Standard | Base |
| 1984-1991 | Harley-Davidson | FLHTC Electra Glide Classic | Base |
| 1989-1991 | Harley-Davidson | FLHTCU Electra Glide Ultra Classic | Base |
| 1985 | Harley-Davidson | FLHX Electra Glide Special | Base |
| 1986-1990 | Harley-Davidson | FLST Heritage Softail | Base |
| 1988-1991 | Harley-Davidson | FLSTC Heritage Softail Classic | Base |
| 1990-1991 | Harley-Davidson | FLSTF Fat Boy | Base |
| 1984-1991 | Harley-Davidson | FLTC Tour Glide Classic | Base |
| 1989-1991 | Harley-Davidson | FLTCU Tour Glide Ultra Classic | Base |
| 1991 | Harley-Davidson | FXDB-S Dyna Glide Sturgis | Base |
| 1985 | Harley-Davidson | FXEF Fat Bob | Base |
| 1987-1991 | Harley-Davidson | FXLR Low Rider Custom | Base |
| 1986-1991 | Harley-Davidson | FXR Super Glide II | Base |
| 1985,1987 | Harley-Davidson | FXRC Low Rider Chrome | Base |
| 1986 | Harley-Davidson | FXRD Sport Glide Grand Touring | Base |
| 1984 | Harley-Davidson | FXRDG Disc Glide | Base |
| 1984-1991 | Harley-Davidson | FXRS Low Glide | Base |
| 1990-1991 | Harley-Davidson | FXRS-Conv Low Rider Sport Convertible | Base |
| 1986-1991 | Harley-Davidson | FXRS-SP Low Rider Sport | Base |
| 1984-1991 | Harley-Davidson | FXRT Sport Glide | Base |
| 1985 | Harley-Davidson | FXSB Low Rider - Belt | Base |
| 1984-1991 | Harley-Davidson | FXST Softail Standard | Base |
| 1986-1991 | Harley-Davidson | FXSTC Softail Custom | Base |
| 1988-1991 | Harley-Davidson | FXSTS Springer Softail | Base |
| 1985-1986 | Harley-Davidson | FXWG Wide Glide | Base |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 493 reviews
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Product Reviews
★★★★★ 5
Affordable, Clean and does the job.
Size: 36 sqft, Size: 36 sqft
I consumed about 90% of this box doing all doors and the tailgate on a 2000 tahoe. I applied it very liberally inside every door (exteror) panel. We then added an almost equal amount of deadening/absorbing/decoupling foam to the other side of the door (panel side). If you know how many rattles a circa 2000 tahoe GMT800 can have by now, you can appreciate why I added this as a "must" if i were to put some money back into this vehicle. Best sub $150 spent on this mini resto so far, right next to tint.
Good quality. Not to thick or thin. Good sized sheets. Seamed to deaden as good as another slightly thicker material i recently used in my F250. My box was delivered with no issues of melting or anything funky. Clean, no major smell before or after and easy to work with. Maybe buy a roller set and wear gloves. Save your hands if your doing inside of panels. Good buy. Will buy more for future projects.
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Reviewed in the United States on February 17, 2026
★★★★★ 5
Great product
Size: 36 sqft
Easy to apply, made a big difference in sound deadening on side by side. Would definitely purchase again.
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Reviewed in the United States on June 1, 2026
★★★★★ 5
AS GOOD AS ANY OTHER, WORKS GREAT
Size: 36 sqft, Size: 36 sqft
Used this in my 17 RAM 1500. This stuff works great, just as good as S...ss brand that is also sold on here. Same thickness and same tackiness. And this stuff sticks like crazy, once its laid down and rolled onto the surface, it is hard to remove, so I am pretty sure it will stay where I installed it. It is great value, one box was enough to do the whole roof of the truck with a little left over for small spots. I think it took a total of 2.5 boxes to do my whole crew cab, roof, floor and back wall and most of the firewall, and I also added a layer of their .25" foam. I do notice a difference in less outside noise, from wind and road. I will be doing my wife car soon, and this is the product I will be using again, I recommend this.
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Reviewed in the United States on January 14, 2026
★★★★★ 5
Dyna... who?
Size: 36 sqft
This stuff works great. Fraction of the cost to Dyna.. and just as good. Very sticky. Used in doors, floors and ceiling. Great product and performs flawlessly. I would highly recommend this.
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Reviewed in the United States on March 13, 2026
★★★★★ 4
Awesome, inexpensive alternative to name-brands!
Size: 36 sqft
Awesome. Stuck well with alcohol prep and time to let liquid flash-off. Very consistent, piece to piece. Backing peeled easily when desired. Compared to Amazon Basics, the butyl seemed a little thicker (infinitesimally) and stickier, foil was less thick than Amazon Basics. Very good value. Started with my nice car, but after completing project, sound dampened all cars in the immediate family it made such a noticeable difference in sound level and quality of music from soeakers. Recommended!
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Reviewed in the United States on October 21, 2025
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