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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 |
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- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
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- To process your return/exchange, please contact us at [email protected]
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4.9 ★★★★★
Based on 29 reviews
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Product Reviews
★★★★★ 5
Satisfied!
Size: 5 L
I absolutely love this product—I've already used it multiple times. The price is affordable, too. Thank you to the seller! Five stars!
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Reviewed in the United States on May 27, 2026
★★★★★ 5
I just got it changed about 30 min ago and the engine sounds like a little cat
Size: 5 L
My Audi factory setting says I should use VW 508.00. Somewhere online it says 5w-40. It's 82000 miles and I decided to give it a shot to go 0W-20 which is what VW508.00 is. I just got it changed about 30 min ago and the engine sounds like a little cat. The gas pedal feel is very smooth, there's definitely less resistance when pushing forward. In Sports mode driving, the engine is not as loud and the lag or drag is noticeably less. And when it hits 100k, I will do a engine flush to see if I can get further improvements. So far, I really love Liqui Moly. I used to use it on my S500 and it was very smooth. A little more money goes a long way! Don't settle for less for your German cars.
Update:
I just did another 1000 miles in a week to Vegas and back. The fuel economy improved about 20%. The power increase is amazing. I could notice when I am going fast, the sustained speed at high speed is easy and continuous, It doesn't just hit a snag when your foot is off the pedal. And the engine is definitely a lot quieter and smoother. I am amazed at the overall improvement after using this oil. No other oil will do from now on.
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Reviewed in the United States on May 17, 2018
★★★★★ 5
Engine Oil
Size: 5 L
Perfect for Nissan Altima 2018 . Huge difference .
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Reviewed in the United States on March 15, 2026
★★★★★ 5
Liqui moly
Size: 1 L
Great product makes the engine work very quiet
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Reviewed in the United States on December 15, 2025
★★★★★ 5
Do it!
Size: 5 L
Use it in a 14 Sierra. Get about 7500 miles an oil change going off the oil life monitor but I drive rough and the trucks modded. Pricier than others, but I feel it’s worth it. Truck runs smoother than what was in it.
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Reviewed in the United States on October 19, 2025