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Start ShoppingCometic C7279 High Performance Top End Gasket Kit - MLS Head Gasket for Off-Road & Sport Applications
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Description
Ensure peak engine performance for your off-road, motocross, ATV, or UTV with Cometic's C7279 High Performance Top End Gasket Kit. Designed for high-compression and modified engines, this premium kit delivers superior sealing and durability in extreme conditions.
Key Features
- Multi-layer steel (MLS) head gasket with embossed sealing rings: Provides exceptional sealing under high cylinder pressures and heat resistance.
- Resists fretting and micro-leakage: Maintains integrity in high-performance applications with minimal risk of compression leaks.
- Designed for aluminum cylinder heads and blocks: Ensures proper clamp load retention and prevents warping in high-heat environments.
- Complete top-end refresh components: Includes valve cover gaskets, intake/exhaust seals, and small O-rings for a full system overhaul.
Why Choose This Product
Cometic's C7279 kit outperforms standard paper/composite gaskets with its advanced MLS construction, offering long-term reliability for high-performance engines. Perfect for riders seeking maximum power and durability without compromising engine integrity. Ideal for racing, trail riding, and modified powerplants where sealing reliability is critical.
SKU:
GM7FABD482
MPN:
C7279
UPC:
191070012410
Category:
Gaskets/Seals
Brand:
Cometic
Stock:
Only 2 left!
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Ensure peak engine performance for your off-road, motocross, ATV, or UTV with Cometic's C7279 High Performance Top End Gasket Kit. Designed for high-compression and modified engines, this premium kit delivers superior sealing and durability in extreme conditions.
Key Features
- Multi-layer steel (MLS) head gasket with embossed sealing rings: Provides exceptional sealing under high cylinder pressures and heat resistance.
- Resists fretting and micro-leakage: Maintains integrity in high-performance applications with minimal risk of compression leaks.
- Designed for aluminum cylinder heads and blocks: Ensures proper clamp load retention and prevents warping in high-heat environments.
- Complete top-end refresh components: Includes valve cover gaskets, intake/exhaust seals, and small O-rings for a full system overhaul.
Why Choose This Product
Cometic's C7279 kit outperforms standard paper/composite gaskets with its advanced MLS construction, offering long-term reliability for high-performance engines. Perfect for riders seeking maximum power and durability without compromising engine integrity. Ideal for racing, trail riding, and modified powerplants where sealing reliability is critical.| SKU | GM7FABD482 |
|---|---|
| MPN | C7279 |
| UPC/GTIN | 191070012410 |
| Brand | Cometic |
| Category | Gaskets/Seals |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Honda | CRF450R | 2019-2025 |
| Honda | CRF450RX | 2019-2022 |
| Honda | CRF450RL | 2020-2022 |
Frequently Asked Questions
Cometic top-end kits are typically designed to include all gaskets and seals required to remove and reinstall the cylinder head and associated components (head gasket, base/cylinder gasket, valve cover gasket, intake/exhaust gaskets, and key o-rings). However, contents vary by part number, so you must confirm the included pieces for C7279 directly from the product description or Cometic’s catalog.
Cometic high-performance MLS top-end kits are generally suitable for engines with increased compression or mild performance upgrades, provided the part number is correct for your specific engine and any required thickness/volume changes are accounted for. For high-boost or heavily modified race engines, consult Cometic or your engine builder for the correct gasket thickness and design.
MLS head gaskets are usually installed dry and rely on proper surface finish, flatness, and torque to seal. Do not apply RTV or copper spray unless Cometic’s documentation for this exact part number specifically recommends it. Some small areas (e.g., cam caps, half-moon plugs) may require RTV per the OEM manual, but not the main MLS sealing surface.
Head gaskets and most crush-type gaskets are designed for one-time use. Cometic and OEM manufacturers recommend replacing the head gasket and any crush/seal gaskets each time the top end is removed. Reusing them increases the risk of leaks and engine damage.
Resurfacing is not always mandatory, but sealing reliability depends on proper surface finish and flatness. If the engine overheated, blew a head gasket previously, or shows signs of warpage, have the head and/or cylinder checked by a machine shop. Follow Cometic’s MLS surface finish recommendations (typically a fine RA value) for best results.
Installation Guide
Difficulty
Medium
Est. Time
2 hr 0 min
Tools Required
- Manufacturer service manual (torque specs & sequence)
- Metric socket set and ratchet
- Torque wrench (critical for head and cylinder fasteners)
- Feeler gauges (if valve clearance check/adjustment is required on the application)
- Soft scraper or plastic razor blades for gasket removal
- Brake cleaner or non-residue solvent for surface cleaning
- Shop rags
- Straightedge and feeler gauges (for checking head/cylinder warpage if needed)
Pro Tips
- Have the OEM or factory service manual open to the top-end section before starting; follow all torque specs and patterns exactly.
- Dry-fit the gaskets first to confirm orientation and that all holes (oil galleries, coolant passages, dowel holes) line up correctly.
- Avoid abrasives like Roloc discs directly on aluminum sealing surfaces; they can create low spots and sealing issues.
- Blow out head bolt threads with compressed air (wear eye protection) and chase with a tap if necessary for accurate torque readings.
- If the application is liquid-cooled, consider flushing and refilling coolant at the same time.
- After first heat cycle, some engines benefit from re-checking critical fasteners if the OEM manual recommends it.
Common Mistakes to Avoid
- Reusing old gaskets or o-rings instead of all new ones in the kit
- Not cleaning gasket surfaces completely, leaving old material or sealant
- Using additional RTV or sealant on MLS head gaskets where it is not specified by the manufacturer
- Incorrect torque sequence or torque value on head and cylinder nuts/bolts
- Failing to verify cam timing/valve timing marks when reassembling
- Not re-tensioning cam chain tensioner properly (where applicable)
- Mixing up dowel pins or omitting them during reassembly
Comparison vs Stock/OEM
Cometic high-performance top-end gasket kits generally provide an upgraded MLS head gasket and performance-oriented sealing materials compared with many OEM composite or single-layer gaskets, while retaining OEM-equivalent fitment.
Improvements
- Improved sealing under high cylinder pressures and temperatures
- Better long-term resistance to fretting and micro-leaks
- Often available in performance-oriented thicknesses to fine-tune compression (application-dependent)
- High-quality coatings and embossments designed for aluminum head/block expansion
Considerations
- MLS gaskets typically require very good surface finish and flatness; engines with damaged or rough mating surfaces may need machining.
- Proper torque and assembly procedure are more critical than with some thicker composite OEM gaskets.
- Always verify gasket thickness vs. OEM to avoid unintended compression changes if the catalog lists multiple options.
Durability & Warranty
Expected Lifespan
When installed correctly on a healthy engine, MLS top-end gaskets typically last the normal service life of the top end or longer, often matching or exceeding OEM longevity under comparable use.
Warranty
Cometic generally offers a limited warranty against defects in materials and workmanship. Actual terms, coverage duration, and claim procedures should be confirmed directly with Cometic or your distributor.
Maintenance
['No periodic maintenance of the gasket itself is required.', 'Monitor for early warning signs of head gasket issues: unexplained coolant loss, oil contamination, white exhaust smoke (for liquid-cooled engines), or compression loss.', 'Follow normal service intervals for valve adjustments, oil changes, and cooling system maintenance to reduce thermal stress on the gasket.']
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