This is who I used when I decided to get more out of my warrior. They do cylinder work, head work, porting, and suspension. They also use various top named parts as Hot Cam, Web Cam, JE, Wiseco, Elka, and Hot Rods to name a few. I am very pleased with they're customer service and the quality of work, their prices aren't bad either. If you guys/gals want to check them out go to www.advmachining.com.