Product images and videos 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.
Gaskets and Seals› Engine Gaskets and Seals
Cometic Gasket
Cometic Harley-Davidson 4in S&S, Tp Base Gasket Pair Big Bore .020inFiber
SKU: C006 C9872-020F
Easy — 1–2 hours
Overview
Show original supplier description
Part #: C9872-020F
For todays hi-horsepower bikes
Vehicle Symptoms
- Oil leaking from cylinder base
- Compression loss on one or both cylinders
- Engine ticking or popping sound at base
- Coolant or oil mixing (if applicable)
- Rough idle or misfire after engine rebuild
Relevant Conversations
- Cometic C9872-020F cylinder base gasket review
- Harley big bore 4.000 gasket set 0.020
- oil leak at cylinder base Harley Dyna
- replacing base gaskets on Evo engine
- Cometic vs James gasket for S&S big bore
- how to install cylinder base gaskets Harley
- best gasket for big bore kit 4 inch
- base gasket thickness 0.020 for compression
- C9872-020F fitment Electra Glide
- Harley base gasket failure symptoms forum
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
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | Cometic Gasket |
| Part Number | C006 C9872-020F |
Videos
Cometic Gaskets presented by J&P Cycles.
Review and Install of the Cometic Gasket for The Harley Primary Cover.
How to Seal Harley Davidson Gaskets and Seals
1998 Harley Davidson FLHTC cylinder base gasket repair pt 1
Bikervation - Part 6 - Harley Sportster XL 1200R Rocker & Head Gasket Replacement /oil leak fix.
![Thicker Head Gasket | When And Why? [HPA Q&A]](https://img.youtube.com/vi/28-FB3kyEDk/hqdefault.jpg)
Thicker Head Gasket | When And Why? [HPA Q&A]
James Gasket Kits Buyers Guide for Harley at RevZilla.com
About MOTORMIA
Buy with Confidence
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.
View Full Return PolicyShipping
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.
Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.
View Full Shipping Policy