Utilizing the longest radius in the industry, the No Lmit Cold Side Kit offers versatility, and is the only kit that currently works with all dual fueler kits on the market , as well as standard stock replacement vehicle that run only the factory single pump. All kits ( aluminum and stainless) are built from high grade thick wall aluminum and high grade thick wall 304 stainless. These kits are factory replacement and work with factory turbo location and intercooler. These are bolt-on units. Available in raw ( coating ready) and polished , all of these kits are hand made and polished in the U.S.A. Includes 2 silicone boots, 4 stainless clamps, and manifold flange 0-ring.