K-Series Intake Manifold 3L Plenum

Developed after extensive dyno and track testing, this manifold is ideal for applications such as K series Miata swaps, as well as conversions in S2000s, BMWs, and Nissans. Constructed from A356-T6 heat-treated aluminum, the manifold boasts extreme durability. It features a forward-facing throttle body location specifically for RWD vehicles and a three-liter plenum volume suitable for both stock and built engines. The 74mm inlet can accommodate a B series throttle body for drive-by-cable setups or a DBW throttle body with an adapter. Integrated K series MAP sensor and idle air control valve (IACV) ports simplify wiring and tuning, ensuring a factory idle and easy connection to the OEM engine harness. The design also provides improved clearance for engine bay components like the belt tensioner and idler pulley. This manifold is available with or without a TSX (RBB) style water port, allowing it to fit all K20 and K24 heads without modifications. KPower recommends using an OEM style metal intake manifold gasket; plastic thermal gaskets can lead to bolt head cracking. For RBB/RBC heads, use Acura part #17105-RAA-A01, and for PRB heads, use #17055-PNA-004. If using a K20A2 or K20Z1 cylinder head, a TracTuff K20A2 Style Upper Coolant Neck is required. K24Z3 R40 manifolds come with larger injector bores for the OEM injectors specific to those engines. Optional accessories such as a new gasket, all new hardware, and a ½” NPT to 90 degree ⅝” barbed fitting for RBB style heads are available. For drive-by-cable setups, KPower recommends pairing this manifold with their 74mm B series throttle body and 3” intake piping. For drive-by-wire applications, options include the Bosch 74mm DBW throttle body, a KPower or Winning Formula throttle body adapter, and an IACV block off plate.