Bolt on instant performance by upgrading your restrictive factory manifold with this Blade Runner ported manifold. Designed to outflow the stock manifold by 12% for improved throttle response, this Blade Runner manifold has both the inlet and the outlet ports machined for a smooth transition and optimal flow path. Constructed from heavy walled, ductile iron to resist warping and cracking, this Blade Runner will outlast OE and factory replacement manifolds. Performance Gains: Outflows factory manifold by up to 12%. Machined Ports: These manifolds have both the inlet and the outlet ports machined for a smooth transition and optimal flow path for improved throttle response. Durable Ductile Iron: Heavy walled ductile iron material resists warping and cracking without compromising the integrity of gasket sealing. Hassle-Free Installation: This manifold bolts directly to the factory y-pipe for easy installation. Emissions Disclaimer: This product is not currently CARB exempt and is not available for purchase in California or for use in any vehicle registered with the California Department of Motor Vehicles. All cafe exhaust systems are engineered and manufactured in our Corona, California facility.