Skunk2 307-05-1005 Ultra Street Intake Manifold Black for Honda L15B Civic 1.5T

Vehicle Fitment

• 2016-2021 Honda Civic (FC1/FK7, EX-L, EX-T, LX, Sport, Touring, L15B7, 1.5T, FWD)
• 2017-2021 Honda Civic Si (FC3/FK8, L15B7, 1.5T, FWD, 6MT)

Fitment Notes

• Designed exclusively for the Honda L15B / L15B7 1.5T DOHC turbocharged engine
• 307-05-1005 is the Black finish version - silver version is sold separately as 307-05-1000
• Compatible with OEM throttle body and Skunk2 Pro Series throttle bodies
• Plenum volume can be expanded using optional Skunk2 0.5L billet aluminum plenum spacer (sold separately)
• ECU/engine tune is required for optimal performance after installation
• Does not fit 2022+ Honda Civic (L15CA engine - different platform)

Features

• Modular 2-piece design with removable plenum for easy disassembly, porting, and cleaning
• Rotatable plenum allows driver-side or passenger-side throttle body mounting
• 1.8L plenum volume with provisions for secondary fuel injection
• 70mm throttle body opening for maximum airflow over the OEM unit
• Tapered high-velocity runners with raised velocity stack entries for improved cylinder fill
• Thick-walled runners provide generous allowances for porting without risk of breakthrough
• Cast from high-grade 356 aluminum alloy - CNC machined for precision fitment
• Thermal gasket included to reduce heat transfer and maintain dense intake charge

Specifications

• Part Number: 307-05-1005 (Black)
• Engine Compatibility: Honda L15B / L15B7 (1.5L DOHC Turbocharged I4)
• Design: Modular 2-piece with removable plenum
• Plenum Volume: 1.8L (expandable with optional 0.5L spacer)
• Throttle Body Opening: 70mm
• Plenum Orientation: Rotatable - driver-side or passenger-side TB mounting
• Material: High-grade 356 aluminum alloy
• Accessory Ports: 4x 1/8-inch NPT, 3x 1/4-inch NPT
• Finish: Black

Included Components

• 1x Ultra Street Intake Manifold - Black (L15B / L15B7)
• 1x Thermal Gasket
• 1x Hardware Set (manifold mounting hardware)

Product Description

The Skunk2 Ultra Street Intake Manifold (307-05-1005) in Black is a purpose-built performance manifold for the Honda L15B / L15B7 1.5T engine found in the 2016-2021 Civic and 2017-2021 Civic Si. Its modular 2-piece design features a removable, rotatable plenum that allows flexible throttle body placement and easy access for porting or cleaning. The 1.8L plenum volume and tapered high-velocity runners - developed using Computational Fluid Dynamics software and validated on the dyno - deliver improved airflow distribution across all four cylinders for stronger mid-range pull and increased top-end power.

With a 70mm throttle body opening, thick-walled runners ready for porting, and provisions for secondary fuel injection, this manifold is designed to grow with the build. It is compatible with the OEM throttle body for a straightforward bolt-on installation, and the included thermal gasket helps maintain charge density by limiting heat transfer from the engine. An ECU tune is required after installation to realize full performance gains, making this manifold an ideal centerpiece for enthusiasts building a comprehensive 1.5T power package.