Skunk2 307-05-0295 Pro Series Black Intake Manifold Honda B16 B17 B18C5 VTEC

Vehicle Fitment

Engine-specific, not vehicle-specific. Fits all Honda and Acura vehicles equipped with B16A, B16B, B17A, or B18C5 (Integra Type R) VTEC B-series engines. Common applications include:

• 1988-2000 Honda Civic (EF, EG, EK chassis) - with B16A or B16B engine swap
• 1999-2000 Honda Civic Si (EK9) - B16A factory
• 1994-1997 Honda Del Sol VTEC (EG2) - B16A factory
• 1997-2001 Acura Integra Type-R (DC2) - B18C5 factory
• Any chassis running a B16A, B16B, B17A, or B18C5 engine swap

Fitment Notes

• B16/B17/B18C5 (non-GSR) ONLY - the 307-05-0295 uses the flange and port design specific to the B16A, B16B, B17A, and B18C5 (Type R) head; the B18C1 (GSR/GS-R) uses a different head port layout and requires a different Skunk2 manifold (307-05-0275 Black or 307-05-0270 Silver); installing the wrong manifold on a GSR head will result in misaligned ports and incorrect fitment
• NOT for non-VTEC B-series engines - this manifold does not fit B18A, B18B, B20A, or B20Z engines; these engines use different head bolt patterns and port configurations
• Three separate flange designs included - the manifold ships with three flange options to accommodate the different intake manifold bolt patterns across B16A, B17A, and B18C5 applications; select the appropriate flange for your specific head during installation
• Compatible with throttle bodies up to 75mm - the manifold's 70mm throttle body opening can be port-matched up to 74mm for larger throttle body installations; factory-size throttle bodies and aftermarket units up to 75mm are compatible
• Not legal for sale or use in California on pollution-controlled vehicles - this product is not CARB exempt; check local emissions regulations before purchasing; not for street use on registered vehicles in states requiring CARB compliance
• Suitable for both naturally aspirated and turbocharged/forced induction applications

Features

• Pro Series design inspired by and improved over the OEM Integra Type R manifold - Skunk2 engineers used the highly regarded factory Acura Integra Type R (B18C5) intake manifold as their design benchmark and starting point; the OEM ITR manifold was already a high-performance piece relative to standard Honda B-series manifolds, with longer runners and a larger plenum than non-Type R applications; Skunk2's Pro Series takes this proven architecture and improves on it with a larger plenum volume and oversized runners that move more air while preserving the ITR manifold's characteristic mid-range torque character; the result is a manifold that outperforms the ITR unit at both mid-range and top-end RPM rather than trading one for the other
• Tapered runners and tapered plenum for broad power gains - the Pro Series manifold's runners are specially tapered in cross-section from the plenum exit to the cylinder head port; this taper creates an accelerating velocity profile as intake charge moves toward the combustion chamber, enhancing the venturi effect and charge momentum at the port entrance; the tapered plenum shape maintains efficient charge distribution to all four runners under dynamic conditions; this combination - unlike a simple oversized plenum with blunt runners - produces power improvements across a wide RPM range rather than only at peak
• Runner exits machined to match cylinder head ports - after casting and CNC machining, the manifold's runner exit flanges are precision-machined to best match the B-series VTEC cylinder head's intake port dimensions; when a manifold runner exit is mismatched in size or shape relative to the head port, a step or ledge forms at the junction that disrupts flow with turbulence and energy loss; port-matched exits eliminate this transition discontinuity for uninterrupted flow from the runner into the combustion chamber
• Wave scavenging optimization - the Pro Series manifold's runner lengths and plenum geometry are designed to exploit the pressure wave dynamics in the intake system at the engine's target operating range; when an intake valve closes, a pressure wave travels back up the runner toward the plenum; if the runner geometry is correct for the engine's valve timing and RPM range, this wave returns to the intake valve at the moment it opens for the next intake stroke, increasing the pressure at the valve entrance and effectively supercharging the intake charge above atmospheric pressure at that moment; Skunk2 designs the Pro Series runner geometry to optimize this wave scavenging effect at the engine's intended power band
• Shell-molded A356 aircraft-grade aluminum construction - A356 aluminum is a heat-treatable aluminum-silicon alloy with superior casting properties, high strength-to-weight ratio, and excellent corrosion resistance; shell molding (a sand casting variant using a thin shell mold) produces castings with better dimensional accuracy, smoother surface finish, and more consistent wall thickness than conventional sand casting; the result is a manifold body that is both structurally strong and dimensionally precise before CNC machining begins; the material is the same alloy grade used in aerospace structural castings
• CNC-machined for precision fitment - after casting, all critical mating surfaces (throttle body flange, head flange, runner exits, and sensor bungs) are precision CNC-machined to dimensional tolerances that ensure leak-free sealing, correct port alignment, and proper sensor fit; CNC machining eliminates the dimensional variability of casting alone and ensures consistent fitment across production units
• Vacuum-tested for quality - each manifold is vacuum-tested before shipping to confirm airtight integrity of all cast surfaces, welded joints, and machined interfaces; a vacuum leak in an intake manifold bypasses the mass airflow sensor's measurement and introduces unmetered air into the engine, causing lean-running conditions and drivability issues; factory vacuum-testing eliminates defective units before they reach the installer
• Smooth internal transitions throughout - the manifold's internal geometry is cast and machined with smooth, radius-blended transitions between the throttle body opening, the plenum volume, and each runner entrance; abrupt transitions and sharp corners in intake manifold airflow paths create turbulence zones, boundary layer separation, and pressure drops; smooth transitions maintain attached flow and minimize losses throughout the induction system
• Black Series finish - the 307-05-0295 is the Black Series version of the Pro Series manifold, featuring a distinctive satin black exterior finish that distinguishes it from the natural aluminum (silver) version (307-05-0290); the Black Series finish is described by Skunk2 as limited edition
• Genuine Skunk2 nameplate - each manifold includes an installed Skunk2 identification badge on the exterior body

Specifications

• Part Number: 307-05-0295
• Brand: Skunk2 Racing
• Product: Pro Series Intake Manifold - Black Series
• Engine Compatibility: Honda B16A, B16B, B17A, B18C5 (VTEC, non-GSR)
• Material: Shell-molded A356 aircraft-grade aluminum
• Finish: Black Series (satin black)
• Throttle Body Opening: 70mm (port-matchable to 74mm)
• Max Throttle Body Compatibility: 75mm
• Flanges Included: Three separate flange designs (for B16A, B17A, and B18C5 applications)
• Applications: Naturally aspirated and turbocharged/forced induction
• Sensor Compatibility: All factory B-series sensors
• CARB Status: Not CARB legal - not for sale in California for street-registered vehicles
• Silver Version: 307-05-0290
• GSR (B18C1) Black Version: 307-05-0275

Included Components

• 1x Skunk2 Pro Series Black Series Intake Manifold (B16/B17/B18C5)
• 3x Flange adapters (for B16A, B17A, and B18C5 fitments)
• Installation hardware

Product Description

The Skunk2 307-05-0295 is the Pro Series Black Series intake manifold for Honda B16A, B16B, B17A, and B18C5 (Integra Type R) VTEC engines - the Black Series finish variant of Skunk2's original high-performance B-series manifold design. Skunk2 Racing, founded in 1994 in Norco, California, is credited with producing the first cast aluminum high-performance intake manifold for Honda B-series engines, and the Pro Series design has been the benchmark for the Honda aftermarket manifold category for decades.

The design philosophy of the Pro Series is deliberately different from the oversized plenum, short runner approach common in race-oriented manifolds: rather than maximizing peak power at the cost of mid-range torque, Skunk2 designed the Pro Series with a larger plenum and tapered oversized runners that improve airflow across the full operating range. The ITR manifold was used as the design baseline - already an above-average factory intake - and Skunk2's engineers improved on it with larger plenum volume and runner geometry that enhances both the venturi effect and the wave scavenging characteristics at the target operating range. Runner exits are machined to match the head ports, and internal transitions are smooth throughout to minimize flow losses. The manifold is compatible with throttle bodies up to 75mm and includes three flange designs to cover all B16/B17/B18C5 applications.

The 307-05-0295 is the Black Series finish version; the natural aluminum version is 307-05-0290. The B18C1 (GSR) requires a separate manifold (307-05-0275 Black or 307-05-0270 Silver). Non-VTEC B-series engines (B18A, B18B, B20) are not compatible. Not for sale in California or for use on emissions-controlled vehicles.