Best Intake Options for 1994-2001 Acura Integra: LS/RS/GS vs GSR/Type R
The 1994 to 2001 Acura Integra came in two distinct performance tiers, and the intake system fitting one does not fit the other. The LS, RS, GS and Special Edition trims ran a 1.8L B18B1 SOHC non-VTEC engine. The GSR and Type R trims ran the 1.8L B18C1 or B18C5 DOHC VTEC engine, a different cylinder head, a different intake manifold and a different throttle body opening. Order the wrong kit and it will not seat against the throttle body correctly, no matter how close the years look on paper.
This guide covers what fits each trim, the real difference between a cold air intake and a short ram intake on this platform, and which option makes sense for your driving.
Why LS/RS/GS and GSR/Type R Need Different Kits
The B18B1 in the LS, RS, GS and Special Edition trims is a SOHC engine with a smaller throttle body and an intake manifold runner angle set up for daily driving torque. The B18C1 in the GSR and the B18C5 in the Type R are DOHC VTEC engines with a larger throttle body, a shorter intake runner design and a higher redline, built to breathe more air at high RPM. For most drivers shopping this platform for performance, the Cold Air Intake Kit for GSR/Type R (CI-AC-03, $79.99) is the strongest match, since it pairs the larger VTEC throttle body with a cooler, shielded intake charge. Because the manifold flange and throttle body diameter differ between the two engine families, an intake pipe sized for the GSR throttle body will not clamp correctly onto the LS throttle body, and the reverse is also true. Rtunes Racing lists these as separate kits by design, not as a single universal part, because a mismatched flange leaves a vacuum leak at the coupler no matter how tight you run the clamp.
Cold Air Intake vs Short Ram for the LS/RS/GS/SE 1.8L
For the SOHC non-VTEC trims, Rtunes Racing offers both a cold air intake and a short ram intake built to the LS/RS/GS/SE throttle body.
The Cold Air Intake Kit for 1994-2001 Acura Integra LS/RS/GS 1.8L (CI-AC-02, $69.99) routes the filter down into the lower fender area, away from direct engine bay heat, and draws in cooler outside air through a mandrel-bent aluminum pipe.
The Short Ram Air Intake Kit for 1994-2001 Acura Integra LS/RS/GS (SI-AC-03, $69.99) keeps the filter under the hood near the strut tower, with a shorter pipe run and a quicker throttle response, at the cost of pulling warmer underhood air during stop and go traffic.
| Feature | Cold Air Intake (CI-AC-02) | Short Ram Intake (SI-AC-03) |
|---|---|---|
| Filter location | Lower fender, shielded from engine heat | Engine bay, near strut tower |
| Intake air temperature | Lower, especially at highway speed | Higher in stop and go traffic and heat soak conditions |
| Throttle response feel | Slightly less immediate | Sharper induction sound and quicker feel |
| Water exposure risk | Higher if driven through deep standing water | Lower, filter sits higher in the bay |
| Best for | Daily driving, highway commuting, hot climates | Spirited driving, track days, cooler climates |
| Price | $69.99 | $69.99 |
Cold Air Intake vs Short Ram for the GSR/Type R 1.8L VTEC
The DOHC VTEC trims get their own dedicated kits sized to the larger GSR/Type R throttle body.
The Cold Air Intake Kit for 1994-2001 Acura Integra GSR/Type R (CI-AC-03, $79.99) is the primary recommendation for this trim. VTEC engines make their power gains at high RPM where air density matters most, and pulling consistently cooler air lets the ECU pull in a denser charge on every VTEC crossover, not only on a cold morning.
The Short Ram Air Intake Kit for 1994-2001 Acura Integra GSR (SI-AC-04, $59.99) is the lighter, shorter option built for drivers who prioritize throttle response and induction sound over the last few degrees of intake air temperature.
| Feature | Cold Air Intake (CI-AC-03) | Short Ram Intake (SI-AC-04) |
|---|---|---|
| Filter location | Lower fender, shielded from engine heat | Engine bay, near strut tower |
| VTEC crossover effect | Cooler charge supports the high RPM power band | Warmer charge under heat soak softens the same gains |
| Price | $79.99 | $59.99 |
| Best for | Track days, autocross, hot climate daily driving | Budget upgrade, sound and throttle feel priority |
Heat Soak, Climate and Stop and Go Traffic
A cold air intake pulls a real advantage in hot climates, but this advantage is not automatic. If you spend most of your drive time in stop and go traffic at low speed, the lower fender area still sits close to the radiator and exhaust downpipe, and airflow through the fender liner drops off when the car is not moving. A cold air intake with a cracked, missing or poorly seated heat shield loses most of its benefit and runs intake temperatures close to a short ram setup. Check the heat shield gasket and seal on any cold air intake every service interval, particularly if the car sees regular stop and go commuting. In regions with flash flooding or standing water on the road during storms, a short ram intake sitting higher in the engine bay carries a lower hydrolock risk than a cold air intake with a low-mounted filter. If you drive through standing water regularly, weigh this risk against the intake temperature benefit before choosing a cold air setup.
Installation Notes for the B18 Platform
Both the B18B1 and B18C intake kits install using the factory mounting points and include hardware sized for the airbox bracket bolt pattern on this chassis. Expect roughly 45 minutes to an hour for a first-time install. Follow the Rtunes Racing installation guide for coupler clamp torque specs and MAF sensor reconnection steps if your Integra runs a factory MAF-based fuel system. After install, double check the coupler clamps at both the throttle body end and the filter end after the first 50 to 100 miles. Rubber couplers settle and loosen slightly as they seat, and a loose clamp at the throttle body shows up as a vacuum leak, a rough idle or a check engine light.
Fitment Matters
The LS/RS/GS/SE and GSR/Type R intake kits are not interchangeable, and ordering by year range alone without confirming your engine code leads to a kit failing to seal against your throttle body. Confirm your engine code (B18B1 for LS/RS/GS/SE, B18C1 or B18C5 for GSR/Type R) before ordering, either from your VIN, your engine bay code sticker or your title. A wrong-fit intake is the single largest driver of returns on vehicle-specific kits, and confirming engine code first avoids the delay of a return and reorder.
Frequently Asked Questions
Does the GSR intake kit fit a Type R?
Yes. The Type R shares the same throttle body diameter and intake manifold flange as the GSR, so the CI-AC-03 and SI-AC-04 kits fit both trims.
Will a cold air intake trigger a check engine light on a B18?
Not on its own, but a loose MAF sensor connection or an unsealed coupler clamp after install triggers a lean code. Confirm every clamp is seated and the MAF connector clicks in fully before your first drive.
Do I need a tune after installing either intake?
Most factory ECUs on this platform adapt to the added airflow within normal fuel trim range. A tune is not required for either kit, though a dedicated tune extracts additional gains if you are also running other modifications.
Which option is louder?
The short ram intake sits closer to the engine and produces a sharper, more noticeable induction sound under throttle. The cold air intake is quieter since the filter sits further from the cabin and engine bay.
Shop Acura Integra Intake Kits
Browse the full cold air intake collection and short ram intake collection, or find your exact fitment on the shop by vehicle page. If you are unsure which engine code your Integra runs or need help confirming fitment before you order, contact the Rtunes Racing team at the FAQ and support page, by email at sales@rtunesracing.com, or by phone at (626) 934-8888. For a look at how this same cold air versus short ram decision plays out on a newer platform, see our guide on Best Intake Options for 2006-2011 Honda Civic, a chassis sharing much of the same SOHC versus DOHC VTEC logic as the Integra.