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1990-2001 Acura Integra B18 Cold Air Intake Kit
This Flashark cold air intake kit replaces the factory airbox on the 1990-2001 Acura Integra B18 (GS, RS, LS and GS-R; DC2 and DC4 chassis) with a 2.75-inch mandrel-bent aluminum intake tube and a dry, reusable cone filter that draws cooler, denser air from the fender well instead of the hot engine bay. It fits the factory B18A1, B18B1 and B18C1 engines and installs as a direct bolt-on on the factory mounting points in about 30-60 minutes, with the couplers, clamps and hardware in the box.
Expected output range: approximately 5-10 hp with a matching mid-range torque gain that is most noticeable between 3,500 and 5,500 rpm. Actual results vary with engine condition, calibration and supporting hardware. No reflash is required — the factory ECU adapts through fuel-trim learning — and the change you feel first is the deeper induction tone under throttle as a B18C1 crosses into VTEC.
Specifications
| Brand | FLASHARK |
| SKU | FLIS25003 |
| Intake style | Cold air intake with heat shield, cone filter positioned in the fender well |
| Material | 6061 aluminum tubing |
| Tubing finish | Black powder-coated |
| Product-page tube diameter | 2.75 in (70 mm) |
| Filter type | Dry (no oil required) |
| Filter media | Cotton gauze |
| Filter style | Cone |
| Filter color | Red |
| Sensor provisions | Bungs and couplers for the factory intake air temperature sensor and PCV breather |
| Installation | Bolt-on on factory mounting points, 30-60 minutes |
| Warranty | 1 year |
Key Features
- Mandrel-bent 6061 aluminum tube: the 2.75-inch intake tube has smooth internal walls that replace the factory plastic tract, with a black powder-coated finish that resists corrosion and engine bay heat.
- Dry cotton-gauze cone filter: oil-free media that filters without coating a hot-wire MAF sensor, and reuses after washing instead of being thrown away.
- Black powder-coated heat shield: steel shield separates the cone filter from exhaust manifold heat and lets it pull cooler air from the fender well.
- Direct bolt-on fitment: pre-drilled mounting brackets line up with the factory holes on DC2 and DC4 Integras, and the couplers, clamps and hardware are included.
- Factory sensor provisions: integrated bungs and couplers for the original intake air temperature sensor and PCV breather keep the OEM sensor position and connections.
- VTEC-ready airflow: the larger tube diameter and free-flowing cone filter support the airflow demand spike at the B18C1 VTEC crossover around 4,800 rpm.
- Expected 5-10 hp mid-range gain: approximately 5-10 hp with a matching torque improvement, most noticeable between 3,500 and 5,500 rpm; results vary with engine condition, calibration and supporting hardware.
- Lower running cost than a paper panel: the washable filter replaces the disposable paper element, so no recurring paper replacement parts are needed.
Who This Kit Is For
This Flashark cold air intake replaces the factory airbox and intake tube on 1990-2001 Acura Integra B18 models (GS, RS, LS and GS-R; DA9, DB1, DC2, DC4 and DB7 chassis). The factory airbox routes intake air through a multi-chamber plastic resonator and a paper panel filter, a design that favors quiet cruising. On B18A1 and B18B1 non-VTEC engines that shows up as a soft low end, and on the B18C1 it softens the crossover note these cars are known for. This kit is for owners who want cooler intake air from outside the engine bay, a reusable filter and a sound the B-series was built to make.
- For you if you drive a 1990-2001 Integra and want a first bolt-on intake upgrade that installs with hand tools.
- For you if you want a washable dry cone filter instead of replacing paper panels.
- For you if you want more induction tone under throttle, especially at VTEC engagement on a B18C1.
- For you if you have already checked your state emissions rules in the Compliance Notice below.
- Not for you if you need an OEM-replacement air filter or intake hose.
- Not for you if you expect a guaranteed MPG gain.
- Not for you if you drive a Type R or a 1.7L ZC car and want a plug-and-play fit — message us first.
- Not for you if you plan deep water crossings without relocating the filter.
Not sure which listing matches your Integra? The 1994-2001 Acura Integra DC2 cold air intake kit is the chassis-specific option for DC2 GS, LS and RS cars.
Check Before Ordering
- Vehicle fitment: exact fit for the applications in the Fitment table above. If your year, chassis or engine code is not in that table, message us with your VIN before ordering.
- Intake type: a fender-well cold air intake with a heat shield, drawing air from outside the engine bay. If you are deciding between styles, is a short ram intake or a cold air intake better for a 1990-2001 Acura Integra build? covers the trade-offs.
- Filter and maintenance: dry cotton-gauze cone filter, washable and reusable, no oil or recharge kit needed. Clean it with water and mild detergent when it looks dirty.
- Sensor and connections: the kit keeps the factory intake air temperature sensor and PCV breather at their original locations, and the necessary bungs, couplers and hose come with it. The sensor itself is reused from your car.
- Emissions legality: this kit carries no CARB Executive Order. Not legal for sale or use in California (and other CARB-adopting states) on pollution-controlled vehicles.
- Install and driving conditions: bolt-on with basic hand tools in 30-60 minutes, no cutting or drilling. The filter sits low in the fender well, so avoid deep water crossings — water ingestion can cause hydrolock and severe engine damage.
What's in the Box
- 1x black powder-coated 6061 aluminum mandrel-bent intake tube
- 1x black powder-coated steel heat shield
- 1x red dry cotton gauze cone air filter
- 1x silicone coupler set with stainless steel clamps
- 1x PCV breather hose
- 1x mounting bracket and hardware kit
Shipping & Returns
Free U.S. Shipping: Orders are typically processed within 1–2 business days and delivered within 7–9 business days. Additional charges may apply to remote areas.
30-Day Returns: Unopened and unused items in their original packaging may be returned within 30 days of receipt. Return shipping is covered for verified quality issues.
Worry-Free Delivery: Optional protection against eligible loss, theft, delay, or transit damage is available at checkout.
| Years | Make | Model | Trim | Engine | Chassis |
|---|---|---|---|---|---|
| 1990-1993 | Acura | Integra | GS / RS / LS / GS-R | B18A1 1.8L DOHC | DA9 / DB1 |
| 1994-2001 | Acura | Integra | RS / LS / GS | B18B1 1.8L DOHC | DC4 |
| 1994-2001 | Acura | Integra | GS-R | B18C1 1.8L DOHC VTEC | DC2 |
| 1994-2001 | Acura | Integra | LS / GS / RS (Sedan) | B18B1 1.8L DOHC | DB7 |
1990-2001 Acura Integra Cold Air Intake FAQs
Q1: Is this cold air intake legal in my state?
A1: This kit does not carry a CARB Executive Order. It is not legal for sale or use in California (and other CARB-adopting states) on pollution-controlled vehicles, so confirm your state and local emissions rules before ordering.
Q2: Will this cold air intake fit my Acura Integra?
A2: It is an exact fit for the applications in the Fitment table above: 1990-1993 Integra GS, RS, LS and GS-R with the B18A1 (DA9, DB1), and 1994-2001 RS, LS, GS, GS-R and sedan models with the B18B1 or B18C1 (DC2, DC4, DB7). It does not fit the 1.7L ZC engine in some 1990-1993 base models, or K-series engines in the RSX. If your trim or engine code is not in that table, message us with your VIN before ordering.
Q3: How much horsepower will this kit add?
A3: Typical intake-only gains for this 1.8L B18 application are approximately 5-10 hp, with the largest improvement between 3,500 and 5,500 rpm. Actual results depend on the vehicle, calibration, installation and supporting hardware.
Q4: Will a cold air intake improve my MPG?
A4: MPG is dominated by driving habits; an intake alone can't guarantee a measurable gain. Expect the main benefit as throttle response and intake tone rather than fuel economy.
Q5: Will this void my factory warranty?
A5: Under the Magnuson-Moss Warranty Act, an aftermarket part cannot void your factory warranty unless it is proven to have caused the failure. This kit is designed as a direct bolt-on replacement that keeps the factory sensors and connections.
Q6: Will it throw a check engine light (CEL)?
A6: This kit is designed to retain the factory intake air temperature sensor location and bore, which keeps the sensor reading within the OEM design envelope. The usual causes of a check engine light after an intake install are a vacuum leak from a coupler that is not fully seated, a disconnected sensor, or an over-oiled filter. Why does my Acura Integra idle rough after a cold air intake installation? walks through each of those causes.
Q7: Do I need a tune after installing this intake?
A7: No tune is required, because the factory sensors stay in their original positions. The OBD1 or OBD2 ECU corrects airflow through short-term and long-term fuel trim during normal driving, so you can install it and drive immediately. A tune only helps if you also run an aftermarket intake manifold, a larger throttle body or aftermarket cams.
Q8: Is it safe to drive in the rain or through deep water?
A8: Normal rain and wet roads are fine, because the filter sits in the fender well behind the splash guard. Avoid deep water crossings; water ingestion can cause hydrolock and severe engine damage. If you regularly ford water, consider a hydro-shield filter sock (sold separately) or a higher-mounted intake.
Q9: Is the filter oiled or dry, and how do I clean it?
A9: The included red cone filter is a dry, oil-free cotton gauze element. Wash it with water and mild detergent when it looks dirty, let it dry completely, then reinstall it. No oil recharge kit is needed.
Q10: How does the intake sound change?
A10: You will hear a deeper induction tone under throttle that becomes especially crisp as a B18C1 crosses into VTEC around 4,800 rpm. At steady highway cruising the difference from stock is minimal. Sound is subjective, so if you want the loudest option, choose an open-element short ram style intake instead.
Q11: What's included in the box, and what do I still need?
A11: The box contains the intake tube, heat shield, red dry cone filter, silicone coupler set with stainless steel clamps, PCV breather hose, and the mounting bracket and hardware. The factory intake air temperature sensor is reused rather than supplied, and basic hand tools are all you need to install it.
Q12: Does this fit the Integra Type R?
A12: Not as a plug-and-play fit. The Type R intake manifold sits at a slightly different angle, and DC2R strut tower clearance is tighter than on a standard DC2. Some owners have made it work with minor adjustments, but this kit is designed for non-Type-R B-series Integras, so message us before ordering if you drive a Type R.
Q13: Does this intake work with the factory strut bar?
A13: On most DC2 and DC4 Integras the intake tube routes under the factory strut bar without interference. If you run an aftermarket strut bar with tighter clearance, test-fit it before final tightening, because some low-clearance bars need a minor bracket adjustment.
Q14: What is the pipe finish, and will it rust?
A14: The 6061 aluminum intake tube carries a black powder-coated finish. Aluminum does not rust, and the powder coating adds protection against engine bay heat, road salt and cosmetic wear.
Fast Shipping Policy
Your order will be dispatched within 1-2 business days, and the package will arrive within your order's estimated date. Click for Shipping Policy
Easy Return Policy
Every order comes with a 30-day free return, provided the item is brand new, uninstalled, and in its original packaging. We cover return shipping for quality issues. Refunds are processed within 3-5 business days. Click for Return Policy
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