My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Cometic C9999 HD Head and Base Gasket Kit 3-13/16" Bore Nallin Racing Spec

Manufacturer

Picture for manufacturer Cometic

Part Number

C9999
9 reviews
Sale Price

$115.88

Estimated ship date Thursday, November 26

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Cometic C9999 is a high-performance head and base gasket kit engineered specifically for Harley-Davidson V-Twin engines with a 3-13/16 inch bore size. Built to Nallin Racing specifications, this gasket set is designed for serious performance applications where reliability under extreme pressure is critical.

Key Features:

  • Precision-engineered for 3-13/16" (3.8125") bore diameter
  • Includes both head gaskets and base gaskets for complete top-end sealing
  • Multi-Layer Steel (MLS) construction with embossed stainless steel layers
  • Proprietary high-temperature coating for superior sealing performance
  • Manufactured to Nallin Racing specifications for racing and high-performance builds
  • Reduced bore distortion and optimized load distribution
  • Resistant to extreme temperatures and combustion pressures

Cometic gaskets are manufactured from premium materials that provide exceptional durability and rebound characteristics, making them ideal for high-compression engines, forced induction applications, and racing builds where standard gaskets fall short.

Very good experience

Delivery was very fast. I didn't expect to receive it so soon.

For my first time shopping here, the price for my item was great and checkout was simple. I'll wait to see the quickness of shipping and how well it is packaged.

NONE

The ordering process was very smooth, order processing was very quick, the big fault in the process was the transportation for final delivery.

I received the parts packaged very well. I'm happy with my purchase

My order was quickly processed, well packed & shipped. The part was authentic (not an overseas knockoff). I could not be happier with this business transaction!

Easy shopping experience.

Great shopping experience!

Share icon
Return Policy
Returns are easy at Autoplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy