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The B18C1 in the 1994–2001 Integra GS-R is one of Honda's most celebrated engines — 170 horsepower, 8,100 RPM redline, and the iconic dual-stage VTEC crossover that still puts a smile on faces decades later. But the factory intake system was designed for a commuter car, not an enthusiast's machine. The restrictive airbox, ribbed rubber plumbing, and resonator chambers smooth out the very induction sound and throttle sharpness that make the B18C1 special.
Flashark's cold air intake replaces the entire factory intake tract with a mandrel-bent, black powder-coated aluminum pipe, a high-flow, washable, dry conical filter, and a heat shield. The result: 3–7 WHP on a stock B18C1, measurably sharper throttle response from 3,500 RPM up, and — most importantly — the deep, aggressive induction growl that finally lets you hear VTEC engage. The crossover at 4,400 RPM becomes an event you can feel and hear, not just read about on a spec sheet.
Installation is bolt-on using the Integra's factory mounting points — no cutting, no welding, no permanent modification. Budget 60–90 minutes with basic hand tools. The factory P72 ECU adapts to moderate airflow changes, so no tune is required for bolt-on use. If you're running headers, cams, or a ported intake manifold, a professional tune will unlock the full potential of the increased airflow.
Key Features
Mandrel-Bent Black Powder-Coated Aluminum Intake Tube — Durable aluminum piping with black powder-coated finish for heat resistance and corrosion protection. A larger, smoother inner diameter replaces the restrictive factory-ribbed rubber plumbing to reduce airflow turbulence.
High-Flow Washable Dry Conical Filter — Red cone filter, washable and reusable. Dry design eliminates the risk of MAP/IAT sensor contamination — no filter oil means no sensor fouling. Designed for high airflow capacity while maintaining filtration efficiency.
Complete Hardware Kit — Includes all silicone couplers, stainless steel clamps, vent hoses, mounting brackets, and fasteners. Everything needed for installation is in the box.
Bolt-On Installation — Uses factory mounting points on the DC2/DC4 Integra chassis. No cutting, welding, or permanent modification required.
No Check Engine Light — Designed to maintain correct sensor positioning and crankcase ventilation routing on the B18C1. No CEL when installed correctly.
VTEC Induction Sound — The most immediately noticeable upgrade: a deep, aggressive intake growl that intensifies at the 4,400 RPM VTEC crossover and continues building to the 8,100 RPM redline. Finally, your GS-R sounds as good as it drives.
Specifications
SKU: FLIS25086
Material: Aluminum piping
Tubing Finish: Black powder-coated
Filter Type: Dry
Filter Color: Red
Clamps & Couplers: Stainless steel clamps with silicone couplers (included)
Vent Hose: Included
Mounting Hardware: All brackets, fasteners, and grommets included
Estimated Install Time: 60–90 minutes
Package Includes
1× Aluminum Intake Tube
1× Dry Conical Air Filter
1× Heat Shield
1× Set of Silicone Couplers
1× Set of Stainless Steel Worm-Drive Clamps
1× Mounting Bracket
1× Complete Fastener Kit
1× Installation Instruction Sheet
| Years | Make | Model | Trim | Engine |
|---|---|---|---|---|
| 1994–2001 | Acura | Integra | GS-R Coupe 2-Door | 1.8L DOHC VTEC (B18C1) |
| 1994–2001 | Acura | Integra | GS-R Sedan 4-Door | 1.8L DOHC VTEC (B18C1) |
Q: Will this fit my 1994–2001 Integra GS-R?
A: Yes — if your Integra is a factory GS-R with the original B18C1 engine and unmodified engine bay layout. Verify your engine block code reads "B18C1" before ordering. Swapped engines or aftermarket intake manifolds may require custom work.
Q: Is this designed specifically for the B18C1 engine?
A: Yes. Designed for the B18C1's dual-runner intake manifold, throttle body position, and engine bay layout in the DC2/DC4 Integra chassis. Differs from B18B1 (non-VTEC) and B18C5 (Type R) in manifold design and plumbing routing.
Q: Will this fit an LS, GS, RS, or SE Integra?
A: No. These trims use the B18B1 non-VTEC engine with a different intake manifold design, throttle body position, and plumbing routing. This kit will not bolt up without modification.
Q: Will this fit an Integra Type R (B18C5)?
A: Not confirmed for Type R. The B18C5 uses a different intake manifold, larger throttle body, and different engine bay details. This kit is designed and tested only on the GS-R B18C1.
Q: Will this fit a B18C1 swapped into a Civic, Del Sol, or other chassis?
A: Not guaranteed. B18C1 swaps into other chassis, introducing variables (radiator position, battery location, hood clearance) that this kit was not designed for. Custom modifications may be required.
Q: How much horsepower will I gain?
A: Expect 3–7 WHP on a stock B18C1, with improved throttle response and VTEC crossover sound. Claims of 14+ HP from an intake alone on a stock GS-R are not realistic — the 170 hp B18C1 is already well-optimized from the factory.
Q: Do I need a tune after installing this intake?
A: No tune required on a stock B18C1. The P72 ECU uses speed-density (MAP-based) calculation that adapts to moderate airflow changes. With supporting mods (headers, cams, etc.), a professional tune is recommended.
Q: Will VTEC sound louder with this intake?
A: Yes — significantly. The factory airbox and resonator chambers suppress intake noise. With this intake, the 4,400 RPM VTEC crossover becomes a distinct audible event, producing a deep induction growl from 4,400 to 8,100 RPM.
Q: Will this cause a Check Engine Light or idle issues?
A: When installed correctly, no. The P72 ECU uses MAP (not MAF), so it's far less sensitive to intake changes. Most post-install issues come from vacuum leaks or disconnected breather hoses — double-check all connections.
Q: Is this a true cold air intake or a short ram?
A: Short ram with heat shield — filter sits in the engine bay. Best balance of sound, throttle response, and simplicity for a street-driven GS-R. No fender liner modifications or hydro-lock risk.
Q: Is there a hydro-lock risk with this intake?
A: Very low. The filter sits in the engine bay (not in the fender well), so water ingestion from rain or puddle splashing is not a concern under normal driving conditions.
Q: Will this improve throttle response?
A: Yes. The smooth mandrel-bent aluminum pipe reduces pre-throttle restriction vs. the factory ribbed rubber plumbing. Throttle response improvement is most noticeable from 3,500 RPM up and through the VTEC crossover.
Q: How do I clean and maintain the dry filter?
A: Remove filter, wash with mild soap and warm water (rinse inside-out), air dry completely. Do NOT oil. Cleaning interval: every 15,000–20,000 miles for street use, more frequently in dusty environments.
Q: Is this compatible with aftermarket intake manifolds?
A: Not guaranteed. Aftermarket manifolds (Skunk2, Edelbrock, etc.) may change throttle body flange angle and position. Compare product photos with your setup before ordering.
Q: How difficult is installation on the GS-R?
A: Plan for 60–90 minutes. The factory resonator behind the bumper takes the most time to remove. Basic hand tools only — 10mm socket, Phillips and flathead screwdrivers. No cutting or welding required.
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