Cold Air Intake Kit for 1994-2001 Acura Integra GS-R 1.8L B18C1

1994-2001 Acura Integra GS-R B18C1 Cold Air Intake FAQs

Q1: Is this intake legal in my state?

A1: Not legal for sale or use in California (and other CARB-adopting states). This kit does not carry a CARB Executive Order number. Outside those states, check your own state or local emissions rules before ordering.

Q2: Will this fit my 1994-2001 Integra GS-R?

A2: Yes — both the GS-R Coupe and the GS-R Sedan are covered, provided the car still runs its original B18C1 engine and an unmodified engine bay. Check the engine code stamped on the block before ordering. Swapped engines or aftermarket intake manifolds can change throttle body position and may need custom work.

Q3: Will it fit an Integra LS, GS, RS or SE?

A3: No. Those trims use the B18B1 non-VTEC engine with a different intake manifold design, throttle body position and plumbing routing, so this kit will not bolt up without modification. If you drive one of those trims, the 1994-2001 Integra GS/LS/RS intake kit linked above is the one built for your car.

Q4: Will it fit a 1991, 1992 or 1993 Integra?

A4: No. This kit is designed for the 1994-2001 Integra GS-R with the B18C1 engine, and earlier Integras are not covered by this fitment. Send us your model year and the engine code on the block, and we will point you to the right intake.

Q5: Will it fit an Integra Type R, or a B18C1 swapped into another chassis?

A5: Neither is something we can promise. The Type R's B18C5 uses a different intake manifold, a larger throttle body and different engine bay details, and this kit is designed and tested on the GS-R B18C1. Swapping a B18C1 into a Civic, Del Sol or another chassis also changes radiator position, battery location and hood clearance, so custom modification can be needed. Message support with your setup and we will tell you what to expect.

Q6: How much horsepower and throttle response will this add?

A6: Typical intake-only gains for a stock B18C1 are approximately +3 to +7 hp, and the smooth mandrel-bent tube reduces restriction ahead of the throttle body, so response is most noticeable from about 3,500 RPM up through the VTEC crossover. Actual results depend on the vehicle's condition, calibration, installation and supporting hardware. The 170 hp B18C1 is already well optimized from the factory, so claims of 14+ hp from an intake alone on a stock GS-R are not realistic.

Q7: Do I need a tune after installing this intake?

A7: No tune is required for a bolt-on install on a stock B18C1. The P72 ECU uses speed-density (MAP-based) load calculation, which adapts to moderate airflow changes. If you add headers, cams or a ported intake manifold, a professional tune is recommended to make the most of the extra airflow.

Q8: Will it cause a check engine light or a rough idle?

A8: Fitted correctly, the kit is designed to keep factory sensor positioning and crankcase ventilation routing intact, and the MAP-based P72 ECU is far less sensitive to intake changes than a mass airflow system. Most post-install drivability complaints come from a vacuum leak or a disconnected breather hose, so double-check every connection. If you do end up chasing a rough idle, this walkthrough covers the usual causes: rough idle after a cold air intake install.

Q9: How much louder is the VTEC crossover with this intake?

A9: Noticeably louder. The factory airbox and resonator chambers suppress intake noise, and with the kit fitted the 4,400 RPM VTEC crossover becomes a distinct audible event, with a deep induction growl building from 4,400 to 8,100 RPM. Sound is subjective, but this is the change GS-R owners notice first.

Q10: Is this a sealed cold air intake or an open-element intake?

A10: It is an open-element intake with a heat shield — the cone filter is mounted in the engine bay and does not sit inside a sealed enclosure fed from the fender or front bumper. That layout keeps the install simple and lets the induction sound through. If you specifically want sealed-box construction with outside air pickup, compare the two layouts before ordering.

Q11: Is it safe in the rain or in deep water?

A11: Normal rain driving is fine. The filter sits in the engine bay rather than in the fender well, so splash from puddles is not a concern in everyday driving. Avoid deep water crossings — water ingestion can cause hydrolock and severe engine damage. If you regularly ford standing water, a higher-mounted setup or the factory airbox is the safer choice.

Q12: How do I clean and maintain the filter?

A12: Remove the filter, wash it with mild soap and warm water (rinsing from the inside out) and let it air dry completely. Do not oil it — this is a dry filter. Clean it every 15,000-20,000 miles for street use, and more often if you drive in dusty conditions.

Q13: How difficult is the install, and what tools do I need?

A13: Plan on 60 to 90 minutes with basic hand tools — a 10mm socket plus Phillips and flathead screwdrivers. Removing the factory resonator behind the front bumper takes the most time. No cutting or welding is required, and the kit bolts to the Integra's factory mounting points.

Q14: Will it work with an aftermarket intake manifold or throttle body?

A14: Check with us first. Aftermarket manifolds such as Skunk2 or Edelbrock units can change the throttle body flange angle and position, and the couplers may not line up. Compare the product photos with your setup, or send us your manifold part number and throttle body size before ordering.

Q15: What is included, and what do I still need?

A15: The box contains the aluminum intake tube, dry cone filter, heat shield, silicone couplers, stainless steel worm-drive clamps, vent hose, mounting bracket, fastener kit and an installation instruction sheet. Your factory sensors and breather hoses are reused, so basic hand tools are enough to complete the job.