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2017-2021 Honda Civic Si 1.5T Cobra Cold Air Intake System - Standard Bore

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Availability – Made to Order (See Lead Times)
Regular price $430.00
Product INFO
  • Vendor PRL Motorsports
  • SKU PRL.PRL-HC10-INT-CAI-B
MAF Housing
Pre-Order
Ships when available
Cobra Sport
⚠️ Cobra Sport Manufacturing & Shipping Notice

Cobra Sport exhaust systems are handmade to order in the United Kingdom.

Estimated manufacturing time is typically 7–10 working days, plus additional shipping time from the UK.

Delivery times may vary depending on international shipping and customs processing.

Please note: SBX Performance is not responsible for any tariffs, duties, customs fees, or import taxes associated with this order. Any applicable charges are the responsibility of the customer.
VETERAN & FIRST RESPONDER DISCOUNT

Veterans, Active-Duty Military, First Responders Discount

FASTER SHIPPING

99% of orders leave the warehouse within 1-3 days of payment

EASY RETURN POLICY

Returns accepted within 30 days of purchase

The PRL Motorsports Cobra Cold Air Intake System is one of the most highly regarded intakes available for the 2017-2021 Honda Civic Si 1.5T. Its CNC-machined billet aluminum Standard Bore MAF housing is engineered to deliver factory-spec fuel trims (within -4% of factory short- and long-term fuel trims) for optimal drivability and performance, requiring no tuning whatsoever. The system uses a 4" volume from the air filter into the MAF housing, reducing pumping loss and creating an unrestricted air path that feeds the engine with ambient-temperature air. 50-state legal under CARB EO D-878-5.

Performance Testing

Third-party tested by Hondata and Innovative MotorWorks, the Standard Bore configuration produces gains of 15 horsepower and 12 ft-lb of torque over stock with no tune required. Long- and short-term fuel trim testing shows consistent trims within -4 LTFT across stock, intake-only, and +6psi Hondata off-the-shelf map configurations. Larger gains are available at higher power levels with custom tuning.

Features

  • Fits all 2017-2021 Honda Civic Si 1.5T, including Honda Sensing package
  • CNC-machined billet aluminum Standard Bore MAF housing
  • Factory-spec fuel trims with no calibration required
  • Retains factory MAF sensor
  • Convertible to Big Bore or Short Ram via optional conversion kits
  • 50-state legal under CARB EO D-878-5

What's in the Box

  • Standard Bore Cobra MAF Housing (Si)
  • PRL Motorsports High Flow Oiled Cone Air Filter
  • 4-Ply Upper Silicone Intake Hose
  • 6-Ply Lower Silicone Intake Hose
  • HDPE Rotomolded Lower Intake Tube
  • (4) 304 Stainless Steel Worm Clamps
  • Stainless Steel Mounting Brackets and Hardware