Machined from a solid piece of aluminum and assembled with Jr Race Car machined components, the ZR-4 Engine is a fast, reliable, and proven winner. Designed to run 7.90 with a 450-480 lbs. package at sea level.
Create an account with us and you'll be able to:
Fill in your email below to request a new password. An email will be sent to the address below containing a link to verify your email address.