✓ VERIFIED
May 16, 2026
not what I needed. description wasn't very clear but not worth sending back. oh well just have to be more careful next time
COMETIC
SKU: 68-9753
Cometic Evo Big Twin EST Gasket Kit OE# 17033-83a - Harley Evolution Big Twin
$196.000,00
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About Cometic
Cometic Gasket manufactures multi-layer steel head gaskets and complete gasket kits in Concord, Ohio. On a built V-twin running higher compression or a big-bore kit, the MLS head gasket is what keeps the top end sealed — which is why Cometic is the default spec on so many engine builds.
For a complete engine overhaul on your Evo Big Twin, a high-quality gasket kit is paramount. This Cometic Evo Big Twin EST Gasket Kit includes all the seals and fasteners needed to refresh your V-twin engine. Engineered with advanced materials, it delivers reliable performance and superior sealing.
Why riders pick this
- Complete engine overhaul kit for Evo Big Twin
- MLS head gaskets for superior sealing
- Steel Viton-coated base gaskets
- Blue Viton valve stem seals for oil control
- All gaskets, seals, and O-rings included
This Cometic Evo Big Twin EST Gasket Kit is engineered for a complete engine overhaul on Harley-Davidson Evolution Big Twin engines, specifically those requiring OE# 17033-83a. It features Multi-Layer Steel (MLS) head gaskets, steel Viton-coated base gaskets, and blue Viton valve stem seals. These components are designed to provide a robust and durable seal, crucial for maintaining optimal engine function and preventing leaks under various operating conditions in your V-twin.
Premium Materials for Enduring Performance
- MLS head gaskets ensure superior sealing and enhanced durability under high pressure
- Steel Viton-coated base gaskets offer excellent resistance to heat and corrosive fluids
- Blue Viton valve stem seals provide precise oil control and reduce oil consumption
- AFM material components deliver reliable sealing across diverse engine surfaces
- Complete kit includes all gaskets, seals, washers, and O-rings for a comprehensive overhaul
Essential for Evo Engine Rebuilds
When rebuilding your Evo Big Twin, using a complete and high-quality gasket kit like this Cometic offering is vital for a successful outcome. This kit streamlines the rebuild process by providing all necessary sealing elements, ensuring a tight, leak-free engine. Trust Cometic's engineering to deliver the reliability and performance your Harley-Davidson V-twin demands on every ride.
Specifications
- Brand: Cometic
- Manufacturer Part #: C9753
- OE Reference #: 17033-83A
- Length: 7.5 in
- Width: 8.7 in
- Height: 2 in
- Weight: 0.38 lbs
Common questions
What components are included in this gasket kit?
This kit includes all gaskets, seals, washers, and O-rings needed for a complete engine overhaul, such as MLS head gaskets, Viton-coated base gaskets, and valve stem seals.
Will this Cometic gasket kit fit my specific Evo engine?
This kit is designed for Harley-Davidson Evo Big Twin engines requiring EST gasket specifications and OE# 17033-83a. Please verify your engine type and part number before ordering.
Is this kit a direct replacement for OEM Harley gaskets?
Yes, this Cometic kit is designed to meet or exceed OEM specifications, making it a direct and high-performance replacement for your factory Harley-Davidson gaskets.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | Cometic |
| TYPE | Gaskets/Seals |
| SKU | 68-9753 |
| WEIGHT | 0.38 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.36
14 RATINGS
5★
11
4★
0
3★
1
2★
1
1★
1
✓ VERIFIED
Mar 8, 2026
Gasket
Working fine was for my brother's bike
✓ VERIFIED
Oct 25, 2024
Works Fine at a lower cost
I usually have an OEM from Harley Davidson, I have used this twice on my 04 Electraglide, no leaks or issues. At a much lower price.
✓ VERIFIED
Jun 8, 2024
A mediocre gasket
I didn’t use this gasket after removing the derby and seeing the Harley gasket that I removed. No comparison in quality. I ended up going to the local dealer and bought an O.E. gasket.
✓ VERIFIED
Jun 6, 2023
A good buy
The gasket fit nicely and no leaks so far . The fitment was spot on .
✓ VERIFIED
May 4, 2023
There is nothing on them indicating they are actually Cometic gaskets. Are they Substitutes?
