Lava Master Cylinder Heat Shield - Fits Wilwood Tandem Jamming major power into a tight space can create some serious trouble. The Lava Master Cylinder Heat Shield is a great way to stay safe and potentially improve braking performance. The Lava Master Cylinder Heat Shield will withstand up to 1200-F continuous and is chemical, oil and even acid resistant. Patent pending design allows this shield to be installed without cracking any brake lines so no need to bleed your system.