RB20DET Cast Intake Manifold Plenum

The Speedtek Auto Racing Cast Intake Manifold Plenum is engineered for robust performance in Nissan Skyline R32, A31, and C33 vehicles equipped with RB20DET and RB20 engines. This intake manifold features a durable two-piece cast construction, with cast runners that lead directly to the plenum chamber. The plenum itself is investment-cast aluminum, designed to withstand boost pressures exceeding 100psi without the risk of ballooning or cracking, a common issue with sheet metal intake manifolds under extreme conditions. This manifold offers several customization options to suit specific build needs. Buyers can specify custom throttle body flanges, and the manifold includes an IACV (idle air control valve) flange underneath for anti-lag or cable throttles. Vacuum port placement can be chosen as top or bottom of the tank, and a throttle cable bracket is available if required. Finishing options for the plenum tank include Sand Blasted, Brushed, or Polished. Additional options such as optional color powder coating, a fuel rail (for 11mm or 14mm injectors), and a new steel fabricated water pipe set are available at an extra cost. Installation may require modifications to the OEM water piping system, though Speedtek Auto Racing offers a fabricated water pipe kit as an optional purchase. Lead times for the product vary; if in stock in Australia, shipping is 3-5 business days, while if not in stock, a 3-4 week lead time will apply.