408ci LS Long Block for NA Valves You also should hear what

You also should hear what the owner of Cutaway Racing has to say about their performance as he has used plenty of them

) and tall (6

880" exhaust

100% virgin Alcoa aerospace-grade aluminum ingot with no remelt

300 hp which covers naturally-aspirated

408ci LS Long Block for NA Valves You also should hear whatIs your project ready for its new LS? Our standard build 408 puts out 720 hp naturally aspirated. No supercharger or crazy cam needed. We get these results from our precision CNC machining, parts selection and tune. If you watch the videos in our YouTube Machining Playlist, you'll better understand how we put up such big numbers on this engine. The short block starts with a seasoned GM 6. 0L block that we have digitally remastered to better than new