I never heard of the 337 intake befor now. Is that like the Stage 6 intake? Looks like the valley cover is part of it.

Streetwise, that is an interesting concept and seems to make sense..specially on relatively low RPM strokers. I have been debating, i have a SD and an M1 to try on my 500 ci stroker. Figured I would now use the M1. even considered selling them and getting a Victor. After reading this, think that might be a waste of money when i already have the best intake(s) for the job.