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High-flow cold air intake kit for 1990-2001 Acura Integra GS, RS, LS, and GS-R (DC2/DC4). Fits B18A1, B18B1, and B18C1 engines. Mandrel-bent aluminum intake tube with black powder-coated finish and dry reusable cone filter. +5-10 HP, sharper throttle response, and amplified VTEC crossover sound. Bolt-on installation in 30-60 minutes — no tuning required.
Overview
Honda's B-series intake design left significant airflow on the table — the factory airbox on the 1990-2001 Integra routes intake air through a restrictive multi-chamber plastic resonator and paper filter panel, prioritizing cabin silence over volumetric efficiency. On B18A1/B18B1 non-VTEC engines, this translates into a lazy low end. On B18C1 VTEC engines, it muffles the iconic crossover roar that Integra owners buy these cars to experience.
The FLASHARK Cold Air Intake Kit replaces the entire factory airbox with a 2.75-inch mandrel-bent aluminum intake tube and a high-flow dry cone filter that draws cooler, denser air from the fender well — away from exhaust manifold heat. Dyno testing shows gains of 5-10 HP and measurable mid-range torque improvement, with the most noticeable difference in the 3,500-5,500 RPM zone where the B-series does its best work. The factory ECU adapts automatically via fuel trim learning — no reflash needed.
Installation is a straightforward bolt-on using factory mounting points: 30-60 minutes with basic hand tools, all hardware included. The dry filter is washable and reusable, eliminating recurring paper replacement costs. And the induction sound under throttle — especially at VTEC engagement — finally matches what the B-series was engineered to deliver.
Key Features
Mandrel-Bent Aluminum Intake Tube — 2.75-inch 6061 aluminum with smooth internal walls eliminates the turbulence of the factory plastic tract. Black powder-coated finish resists corrosion and engine bay heat.
High-Flow Dry Cone Filter — Oil-free cotton gauze media captures debris without coating your MAF sensor. Washable and reusable — no oil recharge kits needed.
Black Powder-Coated Heat Shield — Steel shield isolates the filter from exhaust manifold heat and directs cooler fender-well air toward the intake. The black finish matches the factory engine bay.
True Bolt-On Fitment — Pre-drilled mounting brackets align with factory holes on DC2 and DC4 chassis. All couplers, clamps, and hardware included.
MAF & Sensor-Ready — Integrated bungs and couplers for factory intake air temperature sensor and PCV breather. No check engine light when properly installed.
VTEC-Ready Airflow — A larger tube diameter and free-flowing filter support the airflow demand spike at VTEC crossover (~4,800 RPM on B18C), delivering crisp engagement and an amplified induction roar that Integra owners want.
Specifications
Brand: FLASHARK
SKU: FLIS25003
Material: 6061 Aluminum tubing
Tubing Finish: Black powder-coated
Tube Diameter: 2.75" (70mm)
Filter Type: Dry (no oil required)
Filter Media: Cotton gauze
Filter Style: Cone
Filter Color: Red
Installation: Bolt-on, 30-60 minutes
Warranty: 1 Year
Package Includes
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
| 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 |
Q: What Integra engines does this intake fit?
A: This kit fits factory B-series engines: B18A1 (1990-1993 non-VTEC), B18B1 (1994-2001 LS/GS/RS), and B18C1 (1994-2001 GS-R VTEC). Compatible with both DC2 and DC4 chassis. It does NOT fit the 1.7L ZC engine found in some 1990-1993 base models, or K-series engines in the RSX.
Q: Does this fit the Integra Type R?
A: Not guaranteed. The Type R's intake manifold sits at a slightly different angle, and the strut tower clearance on the DC2R is tighter than on the standard DC2. Some owners have made it work with minor adjustments, but we do not advertise compatibility with the Type R. For a guaranteed plug-and-play fit, this kit is designed for non-Type-R B-series Integras.
Q: What's the difference between the CAI and a short ram intake?
A: A cold air intake routes the filter into the fender well, drawing cooler ambient air for a denser intake charge and more power. A short ram stays in the engine bay, where air is hotter — you get a shorter intake path and faster throttle response, but sacrifice the power benefit of cooler air. This kit is a true cold air intake with fender-well filter placement.
Q: How much horsepower will I gain?
A: Dyno testing shows 5-10 WHP on a stock B18B1 or B18C1, with the largest gains between 3,500-5,500 RPM. Exact numbers depend on engine health, existing mods, and ambient conditions. The more noticeable real-world improvement is throttle response — the engine revs more freely, and VTEC engagement (on B18C1) feels crisper.
Q: Will this trigger a check engine light?
A: No — when installed correctly with the IAT sensor and PCV breather connected. The factory ECU automatically adapts airflow readings. The most common cause of a CEL after installation is a vacuum leak from an improperly seated coupler or a disconnected sensor, both of which are easy to fix by rechecking connections.
Q: Is the filter oiled or dry?
A: Dry. The included red cone filter uses oil-free cotton gauze media. This is a deliberate choice for Honda B-series engines, whose hot-wire MAF sensors are easily contaminated by over-oiled filters. No oil recharge kit required — simply wash with water and mild detergent when dirty, let dry, and reinstall.
Q: Do I need an ECU tune after installing this?
A: No. The factory OBD1 or OBD2 ECU will learn and adapt airflow corrections via short-term and long-term fuel trim within normal driving. You can install and drive immediately. If you have other significant mods (aftermarket intake manifold, larger throttle body, aftermarket cams), a tune will help maximize gains, but is not required for this intake on an otherwise stock engine.
Q: Is it safe to drive in the rain?
A: Yes — standard rain and wet roads are not an issue. The filter sits inside the fender well behind the splash guard, which provides splash protection. However, avoid driving through standing water deep enough to submerge the filter. If you frequently encounter deep puddles or live in a flood-prone area, consider a hydro-shield filter sock (sold separately).
Q: How does the intake sound change?
A: Noticeably deeper and louder under throttle — especially at wide-open throttle and VTEC engagement (~4,800 RPM), where the induction roar becomes aggressive and crisp. At steady highway cruising, there is minimal difference in drone from stock. The sound is one of the most common reasons Integra owners cite for choosing this upgrade.
Q: How long does installation take?
A: 30-60 minutes with basic hand tools (10mm, 12mm sockets, Phillips screwdriver, pliers). The kit uses all factory mounting points — no cutting, drilling, or permanent modification. The most time-consuming step is removing the factory airbox and resonator box from inside the fender, which requires unfastening a few bolts.
Q: What's the pipe finish and will it rust?
A: The 6061 aluminum intake tube features a black powder-coated finish. Aluminum does not rust, and the powder coating provides an additional layer of protection against engine bay heat, road salt, and cosmetic wear. It will maintain its appearance for years under normal use.
Q: Does this intake work with the factory strut bar?
A: On most DC2/DC4 Integras, yes — the intake tube routes under the factory strut bar without interference. If your car has an aftermarket strut bar with lower clearance, test-fit before final tightening. Some tight-clearance bars may require minor bracket adjustment.
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