Skunk2 Ultra Series B Series VTEC Street Intake Manifold Silver Skunk2 Ultra Series B Series VTEC Street Intake Manifold Black Series Skunk2 Ultra Series B Series VTEC Street Intake Manifold Silver Skunk2 Ultra Race B Series Intake Manifold Silver w Black Adapter. Skunk2 Racing is proud to announce the next generation of high performance intake manifolds for the Honda B16A B17A and B18C engine or VTEC cylinder heads! The much anticipated Ultra Race Intake Manifold is the result of years worth of R&D and building upon the performance legacy of our Pro Series Intake Manifold. Using the latest in CFD (Computational Fluid Dynamics) software; Skunk2 Racing has created a three piece modular design that allows for easy disassembly, porting, and plenum volume changes through the use of a removable plenum and optional plenum spacers. The result is a design that is less restrictive, yielding both torque and power gains well over many of the competitors. FEATURES: Modular 3pc. Design w Removable Plenum 3. 5L Plenum Volume** 90mm Throttle Body Flange Std. 5. 0L Ford Pattern 6. 5 Tilted & Tapered Hi Velocity Runners Raised 87mm Velocity Stacks Generously Cast Runner Walls for Porting Provisions Secondary Fuel Rail & Injectors 4 x 1 8 NPT, 2 x 1 4 NPT and 1 x OEM AIT Port Hi Grade Mounting Hardware Thermal Gasket Included Fits MOST Popular Chassis Configurations Not Just Race Cars See Notes **Optional Billet Aluminum Plenum Spacers Available in 1L or 2L Sizes US Patent: D673977