We then pair it with a 4 inch velocity stack and Blox Racing air filter for maximum performance. The Blox air filter can easily be removed to just run the velocity stack. 1pc 4 inch aluminum intake tube. 1pc 3" inch to 4" inch silicone coupler. 1pc 4" inch to 4" inch coupler.1pc 4 inch v-stack (velocity stack) with 6.5 inch outside diameter. 1pc Blox Racing air filter with a 6.5 inch inner diameter & clamp.
All these parts are included for a easy install.