$5770 shipped to you from JEGS, (357 hp/400Tq) complete with frontrunner and all accessories! Sounds like a pretty good deal to me... If one wants more power, they also have 375 and 385 hp versions! Power probably is based on headers since exhaust manifolds is about the only parts the engine needs which isn't included. What is the best iron exhaust manifolds for Vortec heads??

PS. Curious why a 9.0 compression engine requires high octane fuel?