RS Tera Vang Race Pack Fully spliced and ready to go. The Allen RS Tera racing vang pack comes with everything you need to be racing-ready. The kit is spliced to the perfect lengths, allowing maximum travel for the blocks. The kit gives a 6:1 purchase to ensure ease of use for all sailors. Also featured is our ingenious spliced thimble above the top block to allow for a much easier and accessible downhaul control line (see images for example). Includes soft shackle for the base of the mast. Marlow rope and Allen dynamic blocks give maximum friction reduction. Click the PDF above for the installation guide.