You've got the gas guzzler edition of the HD! The 6.0 liter V8 has 366 cubic inches, and the 8.1 liter V8 has 496 cubic inches! I have the same truck. Check out this website.
1 - 3 of 3 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
A forum community dedicated to Chevy Impala owners and enthusiasts. Come join the discussion about performance, SS models, modifications, classifieds, troubleshooting, maintenance, and more!