• 90mm Ultra Side Feed Intake Manifold for K Series engines by Jack Spania Racing, fits K20, K24, EG, EK, DC2, RSX models.
  • 90mm Ultra Side Feed Intake Manifold for K Series K20 K24 engines by Jack Spania Racing, showing the plenum and intake ports.
  • 90mm K Series K20/K24 intake manifold by Jack Spania Racing, side feed plenum for EG, EK, DC2, RSX engine applications.
  • 90mm K Series engine intake manifold by Jack Spania Racing for K20 and K24 engines, with side feed plenum for EG, EK, DC2, and RSX.
  • 90mm ultra side feed intake manifold for K series engines, compatible with K20, K24, and RSX models by Jack Spania Racing
  • 90mm Ultra Side Feed Intake Manifold for K Series K20 K24 engines by Jack Spania Racing, showing the plenum and side feed design.
  • Jack Spania Racing 90mm Ultra Side Feed Intake Manifold for K Series K20 K24 engines on a car engine plenum.
  • 90mm K Series K20 K24 intake manifold by Jack Spania Racing, showing the 4.78L plenum for EG, EK, DC2, and RSX engines.
  • Jack Spania Racing 90mm ultra side feed intake manifold for K Series K20 K24 engines with 4.78L plenum, compatible with EG, EK, DC2, RSX.
  • 90mm K Series intake manifold by Jack Spania Racing, fits K20 and K24 engines, featuring a side feed plenum for Honda EG, EK, RSX.
  • Jack Spania Racing 90mm Ultra Side Feed Intake Manifold for K Series K20 K24 engines, with plenum and intake ports visible.
  • 90mm ultra side feed intake manifold for K Series engines by Jack Spania Racing, fits K20, K24, EG, EK, DC2, RSX models.
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90mm Side Feed Intake Manifold – K Series K20 K24 | 4.78L Plenum | EG EK DC2 Civic RSX | 600–1100HP

90mm Side Feed Intake Manifold – K Series K20 K24 | 4.78L Plenum | EG EK DC2 Civic RSX | 600–1100HP

$499.95 USD
$499.95 USD
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Dominate the Track with the Ultimate K-Series Intake Manifold

Built for serious power, the 90mm Side Feed Intake Manifold is engineered specifically for Honda/Acura K20 and K24 engines. With a massive 4.78L plenum volume — outclassing the Skunk2 Ultra's 3.5L — this manifold delivers the airflow your high-horsepower build demands, supporting 600–1100HP.

Whether you're building a track weapon or a street-legal monster in your EG, EK, DC2 Civic, or RSX, this manifold is the foundation your K-series deserves.

Key Features

  • 4.78L Jackspania Ultra Plenum Volume — significantly larger than Skunk2 Ultra 3.5L for superior airflow
  • RSX Style Intake Manifold Flange — direct fitment for K-series applications
  • 80mm / 90mm Throttle Body Compatible — also fits any TB with an 86–93 Ford 5.0L Mustang flange
  • 4 x Internal Velocity Stacks — maximise air flow and volumetric efficiency
  • 5.75" Runners at 1.875" Diameter — optimised runner length and diameter for mid-to-high RPM power
  • 3 x 1/8 NPT Vacuum Ports — built-in for boost, MAP sensor, and ancillary connections
  • Supports 600–1100HP — built for forced induction and high-compression naturally aspirated builds

Important Notes

  • An AC/PS eliminator kit is required for installation with this manifold

Compatibility

  • Honda Civic EG / EK
  • Acura Integra DC2
  • Acura RSX
  • All K20 / K24 K-Series engine applications

Stop leaving power on the table. Upgrade to the intake manifold that serious builders choose.

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