Chan,
Shorts do not as we can not warrant what a builder or end-user may do or use in the completion of the build. We are however very sensitive to any issues found in our shorts (pardon the expression)
and will inspect any problem found and work with the customer to resolve.
The complete engines we offer are 2 year warranted on pump gas models as long as the owner sends back the warranty card within 30 days of the invoice date.
Thanks for the kind words.