Skunk2's Pro Series Intake Manifold for Honda's K-series features a larger plenum and shorter, over sized runners when compared to the RBC, and is cast with thicker wall material, leaving room for further porting for high-horsepower applications. Instead of producing a manifold with a significantly over sized plenum and excessively short runners that would sacrifice mid-range power, the Pro Series manifold was designed for the street enthusiast who want more power but doesn't want to sacrifice mid-range performance to get it. The results are improved airflow, an enhanced venturi effect, and both mid-range and top-end power gains.

Skunk2's cast-aluminum Pro Series Intake Manifold for Honda's K-series is a direct-fit replacement for all K20/K24 engines thanks to its unique, patent-pending water neck design and throttle body flange, which is compatible with OEM throttle bodies as well as those as large as 76mm (06+ Civic Si requires adapter, sold separately). The special water neck design eliminates the cutting that would otherwise be involved with some RBC applications (remaining applications require special 1.0 x 11.5-inch NPT plug, sold separately), and the supplied thermal-insulated intake manifold gasket makes for a truly bolt-on installation (no drilling or modifying required). Pro Series manifolds also incorporate an angled-runner design, which allows for ample hood clearance on 88-00 Civics and 90-01 Integras with a K-series engine swap, as well as additional core support clearance on 02-05 Civic Si's.

Pro Series Intake Manifolds offer horsepower and torque gains greater than the popular RBC manifold but without compromising mid-range power output. The design incorporates runners that are similar in length to the RBC's but with larger bores, a special tapered design, as well as a larger, tapered plenum that together preserve mid-range power but increase and accelerate airflow to allow for significant top-end power gains. Pro Series Intake Manifold runner exits are also machined and hand-finished to best match the cylinder head's ports. Skunk2's Pro Series intake manifold's shape and design also increases wave scavenging effects at the engine's ideal operating range, which allow for a broad increase in usable power.

Features

• Increased Mid-Range and Top-End HP and Torque
• Unique Water Neck Adapter Eliminates Cutting
• 70mm Throttle Body Bore
• Compatible With Up To 76mm Throttle Bodies
• Thermal-Insulated Gasket Included
• No Throttle Body Adapter Required
• Angled Design for K-Swap Hood Clearance
• High-Grade, 356-Aluminum Construction
• OEM-Quality, Shell-Molded Casting
• Skunk2 Nameplate
• Vacuum-Tested for Quality
• OEM Sensor Provisions

Vehicle applications: 02-05 Civic Si, 02-06 RSX, K-swapped 88-00 Civic/CRX / 92-97 Delsol / 90-01 Integra vehicles w/Type-S (PRB) head

Vehicle Application Notes

• Compatible with 02-06 RSX and 02-05 Civic Si engines or PRB & PPA style heads.
• Will NOT work for 06-11 Civic Si (RBC/RBB  head) because of drive-by-wire throttle-body incompatibility and upper water neck caveats.
  CLICK HERE for Skunk2 06-11 Civic Si Pro Manifold
• Mainly designed to be used on K-series swapped vehicles that utilize a cable driven throttle-body for 88-00 civic/90-01 integra w/K20A/A2/Z1 engines & PRB or PPA K-series cylinder heads
• NOT compatible with K20Z3 (06-11 Civic Si) & K24A2 (TSX) style heads

Note: Lead photo used for illustration purposes. Additional photos are of actual RSX/Civic Si (307-05-0310) manifold.