Our billet Exhaust Manifold Jig / Purge Block Kits have been helping big (and small) name fabricators speed up exhaust manifold production time and quality for years. These kits allow fabricators to bolt Toyota 2JZ-GTE exhaust manifold flanges to the 6061 billet block for back-purging to ensure full weld penetration. The aluminum purge block also helps act as a heat sink to ensure flange trueness. Fabricators can also use this kit to create exhaust manifold collector jigs.Kit Includes: