LS1 Vacuum/Boost Billet Aluminium Distribution Block w/ Valley Cover Bracket This billet aluminium vacuum/boost reference billet distribution block is made to simplify and clean up plumbing lines for boost and vacuum purposes on your boosted LS engine. The design allows the block to be mounted off the upper two most holes on LS1 cylinder heads front or rear as well as on a firewall, or anywhere else. This manifold is CNC machined from 6061 aluminium and features 2 1/4″ NPT end ports and 8 separate 1/8 NPT ports on sides giving you many different options for line routing and enough spaces for all of your boost reference signals. This works great for plumbing to your boost reference fuel pressure regulator, manifold pressure wastegates, blow off valve, boost controller sensor and many other items.
