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Gaskets and Seals› Engine Gaskets and Seals
Cometic Gasket
Cometic Harley-Davidson 1948-65 Panhead Fl,Flh Est Complete Gasket Kit
SKU: C006 C9966
Easy — 1–2 hours
Overview
Show original supplier description
Part #: C9966
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.
Complete EST Gasket Kit | 3.750in. Bore
Vehicle Symptoms
- Oil leaking from cylinder base and head gaskets
- Loss of compression and rough running
- Excessive engine blow-by and smoke
- Overheating and coolant leaks (if applicable)
- Engine misfire or backfiring due to gasket failure
Relevant Conversations
- Cometic C9966 gasket kit for Panhead 48-65
- Harley Panhead engine rebuild gasket set
- Panhead oil leak fix gasket replacement
- Best gasket kit for Big Twin Panhead engine
- Cometic vs stock Panhead head gasket
- Panhead cylinder base gasket leak symptoms
- How to replace Panhead engine gaskets
- Panhead compression loss fix gasket kit
- Harley Panhead top end gasket kit C9966
- Panhead engine rebuild parts list
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
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Specifications
| Brand | Cometic Gasket |
| Part Number | C006 C9966 |
Videos
Cometic Gaskets presented by J&P Cycles.
Review and Install of the Cometic Gasket for The Harley Primary Cover.
Reviewing Cometic's MLX Head Gaskets
How To Create The Everlasting Engine Gasket And One Common Mistake To Avoid
Product Review: EBay LS1 LQ4 6.0 6.2 cylinder head gaskets vs Mahle OEM Gaskets
How to Seal Harley Davidson Gaskets and Seals
Harley Davidson Exhaust Gasket! How to install.
Choosing The Right Head Gasket For Your Performance Engine Application
James Gasket Kits Buyers Guide for Harley at RevZilla.com
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Returns & Fitment
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.
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