2 Ring Standard Bore Inline Piston Ring - 18-3918 - Sierra
Price: $39.00
Save: $11.49
(22% Off $50.49)
Part # 18-3918
2nd Day Air for $2.99 More Eligible
SHIPS TODAY!* if ordered in 2 hrs 26 mins.
No Reviews
This item is found in the following Product Families
Replaces OEM part #
  • MERCURY MARINE 39-817096A6
Does this set include rings for 1 or 2 pistons?
It is for one piston. Two rings, but one piston.

What is the diameter of the rings? (bore size)?
Manufacturer confirms: BORE SIZE: 2.875/STD

Ask a question
Question & Answer Guidelines
This product ships in 1 business day.
Add to Cart and enter your Postal Code to determine the shipping charges.
Most products and orders leave our warehouse in 1 business day. However, select items may take more processing time. Alaska and Hawaii orders please add 1 additional warehouse processing day.
Standard Shipping Policies
Do you need Professional Installation? has teamed with a national network of independent installers that are ready to handle your installation needs.
Find your local Amtech dealer: