Awesome facility and friendly service. The guys at underground are knowledgeable and experienced. They are very courteous and honest...found an issue and they called me in to show me. I really appreciated that honesty especially with so many horror...
Read more...2011 Cadillac CTS-V Coupe
593whp / 637tq @ 14.5psi
-Custom Intake
-Pulley swap
-Cat delete
-FIC1000 injectors
-Flex fuel tune for 93 to e85