P-Ayr Products 2046 GM LS1 Set-Up Short Block w/ Cylinder Heads

These lightweight setup blocks are made of closed-cell polyurethane molded directly from original castings. These mock up motor blocks are great for mocking up engine mounts in a chassis and you can even bolt up all of your accessories to check for fit and clearance. Just a few of the features include: Threaded steel inserts in key bolt locations (spark plugs engine and accessory mounts ect. ) Accepts original front and rear main caps. Accepts original oil filter. Easily painted.