Your cart is empty
Start ShoppingCometic C9553 MLS Head/Base Gasket for Sportster Engines – Durable & Reliable
Fits your
May not fit your
Description
Upgrade your Sportster engine's sealing performance with the Cometic C9553 MLS head/base gasket. Engineered for precision fit and long-lasting reliability, this gasket ensures optimal compression and prevents leaks for maximum power and efficiency.
Key Features
- Multi-Layer Steel (MLS) Construction: Provides exceptional sealing strength and resistance to heat, oil, and pressure for reliable engine performance.
- Precision Fit for 3.875 in. Bore: Perfectly sized for Sportster engines to ensure a flawless seal and prevent compression leaks.
- 0.055 in. Thickness: Optimized thickness for balanced sealing pressure and reduced risk of warping or damage.
- Lightweight Design (0.2 lbs): Reduces engine strain while maintaining structural integrity and durability.
- Durable for Long-Lasting Performance: Built to withstand extreme conditions and maintain sealing integrity over time.
Why Choose This Product
Whether you're a rider seeking reliability or a racer demanding peak performance, the Cometic C9553 gasket delivers unmatched sealing capabilities. Its MLS construction prevents blow-by and oil leaks, while the precise fit ensures compatibility with 3.875 in. bore Sportster engines. The lightweight design minimizes stress on engine components, making it ideal for high-performance applications. Trust Cometic's reputation for quality to keep your engine running smoothly and efficiently.
Delivery
Checking availability...
Estimated arrival
Order within to ship today
Orders ship
Shipping to
Enter your ZIP code for delivery estimate
Price Match Guarantee
Found it cheaper?
Log in to submit a price match request.
Price
Quantity
Free Shipping $100+
14-Day Returns
Secure Checkout
Price Match
Complete the Build
This item
$26.99
In Cart
Upgrade your Sportster engine's sealing performance with the Cometic C9553 MLS head/base gasket. Engineered for precision fit and long-lasting reliability, this gasket ensures optimal compression and prevents leaks for maximum power and efficiency.
Key Features
- Multi-Layer Steel (MLS) Construction: Provides exceptional sealing strength and resistance to heat, oil, and pressure for reliable engine performance.
- Precision Fit for 3.875 in. Bore: Perfectly sized for Sportster engines to ensure a flawless seal and prevent compression leaks.
- 0.055 in. Thickness: Optimized thickness for balanced sealing pressure and reduced risk of warping or damage.
- Lightweight Design (0.2 lbs): Reduces engine strain while maintaining structural integrity and durability.
- Durable for Long-Lasting Performance: Built to withstand extreme conditions and maintain sealing integrity over time.
Why Choose This Product
Whether you're a rider seeking reliability or a racer demanding peak performance, the Cometic C9553 gasket delivers unmatched sealing capabilities. Its MLS construction prevents blow-by and oil leaks, while the precise fit ensures compatibility with 3.875 in. bore Sportster engines. The lightweight design minimizes stress on engine components, making it ideal for high-performance applications. Trust Cometic's reputation for quality to keep your engine running smoothly and efficiently.| SKU | GM954082EC |
|---|---|
| MPN | C9553 |
| Brand | Cometic |
| Category | Gaskets/Seals |
0.0
0 reviews
0
Log in to write a review.
Reviews
No reviews yet. Be the first to review this product!
Featured Review
| Make | Model | Years |
|---|---|---|
| Harley-Davidson | Sportster (XL883, XL1100, XL1200) | 1986-2003 |
| Harley-Davidson | Sportster Evolution | 1991-2003 |
Frequently Asked Questions
No, C9553 fits 1986-2003 Sportster models with 3.875 in. bore. Check 2004+ models for C9885 or similar.
Yes, 0.055 in. MLS vs. stock paper gasket ~0.040 in. Ideal for higher compression builds.
Not required, but recommended for optimal sealing in high-performance applications.
Yes, MLS construction supports up to 12:1+ compression ratios.
Installation Guide
Difficulty
Medium
Est. Time
1 hr 0 min
Tools Required
- torque wrench
- socket set
- gasket scraper
- engine degreaser
Pro Tips
- Clean all surfaces with brake cleaner
- Follow Harley torque specs (typically 12-18 ft-lbs)
- Use assembly lube on bolts
Common Mistakes to Avoid
- Not cleaning mating surfaces thoroughly
- Incorrect torque sequence
- Over-torquing bolts
Comparison vs Stock/OEM
Multi-layer steel vs. stock paper/composite gasket
Improvements
- Superior sealing under high pressure
- Better heat resistance
- Handles higher compression
- Longer lifespan
Considerations
- Requires cleaner surfaces
- Slightly thicker than stock
Durability & Warranty
Expected Lifespan
Engine life (no replacement needed unless engine work)
Warranty
1 year manufacturer defect warranty
Maintenance
Inspect during valve service; no regular maintenance required
What Others Are Saying
Reviews from across the web
