Description
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The seventh-generation Civic (2001-2005, EM2/ES1/EP3 chassis) came with an intake system designed for silence and cost, not airflow. The factory airbox routes intake air through a narrow-diameter snorkel, a restrictive paper panel filter, and a ribbed rubber intake hose — all of which choke the D17 1.7L and K20A3 2.0L engines at anything above 4,000 RPM. Unfortunately, most aftermarket solutions force a trade-off: Long Ram for cold air but sluggish throttle response, or Short Ram for better throttle response but hotter engine bay air.
This kit solves that problem with a dual-pipe design — you get both a Long Ram pipe (true cold air, routes filter into the fender well behind the driver-side bumper) and a Short Ram pipe (filter stays in the engine bay for instant throttle snap), all in one box. Both pipes are mandrel-bent from 63mm (2.5-inch) aluminum with a durable black powder-coated finish, and both use the same high-flow dry cone filter. The included hardware — silicone couplers, stainless steel clamps, breather hose, and vehicle-specific mounting bracket — lets you install either configuration without cutting, drilling, or making any permanent modifications.
Power gains are honest: 3-7 WHP on D17 engines, 4-8 WHP on the K20A3 Si, with the most noticeable improvements being sharper throttle tip-in, better mid-range pull from 3,500-5,500 RPM, and a deeper, more aggressive induction note. No ECU tune is required on naturally aspirated D17 or K20A3 engines — the factory MAF sensor and ECU fuel trims adapt safely. Installation takes 45-75 minutes with basic hand tools, and switching between Long Ram and Short Ram configurations takes about 20 minutes once you're familiar with the routing.
Key Features
63mm (2.5") Mandrel-Bent Aluminum Piping — Both pipes are precision-bent from lightweight aluminum with a black powder-coated finish. Smooth internal walls eliminate turbulence caused by the factory-ribbed rubber hose. Rated for under-hood temperatures exceeding 400°F.
High-Flow Dry Cone Filter — Red synthetic cotton gauze media, washable and reusable. No oil required — eliminates any risk of MAF sensor contamination. Filter dimensions: 120mm top OD × 155mm bottom OD × 63mm inlet ID.
Covers Every 2001-2005 Civic Trim — Compatible with DX, LX, EX (D17A1/D17A2), HX (D17A6 VTEC-E lean burn), GX (D17A7 CNG natural gas), and Si (K20A3 2.0L EP3 hatchback). One kit for the entire chassis generation.
Complete Bolt-On Hardware Kit — Includes 2× silicone straight couplers (63mm), 4× stainless steel clamps, reinforced breather hose, aluminum mounting bracket with M6 rubber vibration isolator, washer, lock nut, and grommets. Reuses your factory MAF sensor.
Aggressive Induction Sound — Expect a noticeably deeper intake growl under throttle, especially above 3,500 RPM. The D17 VTEC crossover becomes audibly sharper; the K20A3 Si gains a satisfying induction bark through the intake.
Specifications
Brand: Flashark
SKU: FLIS25058
Material: Aluminum piping
Tubing Finish: Black powder-coated
Pipe Configuration: Dual — Long Ram + Short Ram included
Tube Outer Diameter: 63mm (2.5")
Tube Wall Thickness: 1.6mm
Filter Type: Dry
Filter Media: Synthetic dry cotton gauze (red)
Coupler Material: Reinforced rubber, straight type (D63 × 64mm)
Clamp Type: Stainless steel worm-drive
Mounting Hardware: Aluminum bracket + M6 rubber isolator + washer + lock nut
Weight: 2.9 kg (6.4 lbs)
Installation Time: 45–75 minutes (first install); ~20 minutes to switch configurations
Fits: 2001-2005 Honda Civic DX / LX / EX / GX / HX / Si
Package Includes
1 × aluminum intake pipe
1 × High-flow dry cone filter
2 × Straight rubber couplers
1 × Reinforced breather hose
5 × Stainless steel worm-drive clamps
1 × Aluminum mounting bracket
1 × Installation Hardware
| Years | Make | Model | Trim | Body | Engine |
|---|---|---|---|---|---|
| 1996-2000 | Honda | Civic | EX | Coupe | 1.6L SOHC VTEC (D16Y8) |
| 1996-2000 | Honda | Civic | EX | Sedan | 1.6L SOHC VTEC (D16Y8) |
| 1996-2000 | Honda | Civic | EX-R | Coupe | 1.6L SOHC VTEC (D16Y8) |
| 1996-2000 | Honda | Civic | EX-R | Sedan | 1.6L SOHC VTEC (D16Y8) |
Q: Does this fit my 1998 Civic EX Coupe D16Y8?
A: Yes — this is exactly the car this intake was designed for. All 1996-2000 Civic EX and EX-R trims with the D16Y8 1.6L SOHC VTEC engine, in both Coupe (EJ8) and Sedan (EJ8) body styles, are direct bolt-on compatible.
Q: Will this fit a Civic DX, LX, CX, or HX?
A: No. DX, LX, and CX use the D16Y7 (non-VTEC) engine with a different intake manifold and throttle body configuration. HX uses the D16Y5 (VTEC-E lean-burn) with yet another intake layout. This intake is engineered specifically for the D16Y8 — its intake path, sensor placement, and breather routing are incompatible with the other D-series variants used in these trims.
Q: Does this fit the 1999-2000 Civic Si?
A: No. The 1999-2000 Civic Si (US, EM1 chassis) uses the B16A2 DOHC VTEC engine with a completely different intake manifold, throttle body position, and intake routing. This kit is designed for the D16Y8 SOHC VTEC engine only.
Q: Is this a true cold air intake or a short ram?
A: This is designed as a true cold air intake — the filter routes into the fender well, drawing cooler air from outside the engine bay. Unlike a short ram that sits the filter in the hot engine bay, a cold air setup produces lower intake temperatures and a denser air charge. The trade-off is a slightly more involved installation (routing the tube through the fender opening) and the need to avoid deep standing water since the filter sits lower than a short ram.
Q: How much horsepower will I gain?
A: 3-8 wheel horsepower on a stock D16Y8, depending on engine condition, supporting mods, and ambient temperature. The D16Y8 is a 127-hp economy engine — there are no magic 15-hp intakes for it. The real improvement is sharper throttle response, stronger mid-range pull from 3,500-6,000 RPM, and a dramatically better VTEC induction soundtrack.
Q: Do I need a tune after installing this intake?
A: No. The D16Y8's factory ECU uses a MAP (Manifold Absolute Pressure) and IAT (Intake Air Temperature) sensor system that automatically adapts fuel delivery within its correction range. The ECU measures manifold pressure to calculate fueling rather than directly measuring airflow — so moderate intake changes are accommodated without retuning. If you've also done a header, exhaust, or cam upgrade, a tune will unlock additional gains.
Q: Will this trigger a check engine light?
A: Not when installed correctly. The most common causes of a CEL after an intake install on the D16Y8 are: a loose or kinked breather hose, a vacuum leak at the coupler or clamps, an improperly seated IAT sensor, or a pre-existing issue that was masked by the restrictive factory intake. Double-check all connections before starting the engine. If a CEL appears, scan the code — common D16Y8 codes at this age (O2 sensor, EVAP) are often unrelated to the intake.
Q: Will the intake make my Civic louder?
A: Yes — significantly, in a good way. The factory system uses a ribbed rubber intake tube and a sealed airbox with resonator chambers specifically designed to silence induction noise. Removing them and routing the filter into the fender produces a deep, aggressive intake growl under acceleration, especially from 4,500 RPM up at VTEC engagement. At idle and light cruise, it's barely noticeable. At wide-open throttle, the D16Y8 finally sounds like an engine rather than a sewing machine.
Q: Is the filter dry or oiled?
A: Dry cotton gauze filter — no oil required, ever. The D16Y8 uses an IAT (Intake Air Temperature) sensor in the intake tract. While this sensor isn't as contamination-sensitive as a hot-wire MAF, a dry filter still eliminates any guesswork about maintenance. To clean: tap off any loose debris, wash with filter cleaner, rinse thoroughly, air-dry completely, and reinstall. No re-oiling, no mess.
Q: Is there a risk of water getting into the engine?
A: There is a small risk if you drive through deep standing water — the filter sits in the fender well, which is lower than the factory airbox. Normal rain and wet roads are completely safe. Avoid driving through flooded streets, deep puddles, or water crossings where the water level reaches the bottom of the bumper. This is standard practice for any cold air intake, not unique to this kit.
Q: How difficult is the installation?
A: Straightforward — budget 45-60 minutes. You'll need basic hand tools (socket set, screwdrivers, pliers). The process: remove the factory airbox and resonator assembly, remove the factory intake tube, route the new aluminum tube through the fender opening, mount the bracket to the factory bolt location, connect the silicone coupler to the throttle body, attach both breather hoses to the PCV ports, clamp the filter onto the tube in the fender well, and double-check all connections. The fender liner does not need to be fully removed on most EK Civics — you can reach in from the engine bay side.
Q: Is this intake better than the stock airbox?
A: Yes, in three meaningful ways. First, airflow: the 63mm smooth aluminum tube flows better than the factory ribbed rubber hose with its internal turbulence. Second, temperature: the filter in the fender well draws cooler air than the factory box, pulling hot engine-bay air. Third, sound: the sealed factory system exists to silence the engine — removing it lets the D16Y8's VTEC induction note actually reach your ears.
Q: Will I get better fuel economy?
A: Not guaranteed and not the reason to buy this intake. Reduced intake restriction can marginally improve cruising efficiency at steady highway speeds, but the effect is small. If you're driving harder to enjoy the new VTEC induction sound — which you will be — you'll likely see no improvement or a slight decrease. The D16Y8's fuel economy is dominated by driving style, not intake restriction.
Q: Is it suitable for daily driving?
A: Yes — once properly installed and tightened, this intake is perfectly fine for daily use. The filter is washable and reusable; the aluminum tube won't crack or degrade like the factory rubber intake; and the mounting bracket with a rubber damper isolates vibration. Just avoid deep puddles (standard cold air intake practice) and check the filter condition during regular oil changes if you live in a dusty area.
Q: Is a cold air intake worth it for the D16Y8 Civic EX?
A: For most EX/EX-R owners, yes — with the right expectations. This is not a big horsepower mod. What it delivers is a sharper, more responsive throttle feel, a genuinely engaging VTEC induction soundtrack, and a reusable high-flow filter that you'll never need to replace. For a relatively low cost, it transforms how the car feels and sounds during spirited driving — and that's exactly what most D16Y8 owners are looking for.
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