K&N E-2427 Acura Integra Engine Air Filter 1994-2001

K&N E-2427 Acura Integra Engine Air Filter (94-01)

Your 1994-2001 Acura Integra still has a paper engine air filter in the factory airbox. When that element is packed with dust and the car feels lazy off idle, this is the washable Acura Integra air filter that drops in the same box.

The factory Integra airbox takes a tall round element, 7.875 inches high, with a 3.375 inch neck at 30 degrees. One filter and 1 oz of sealing grease come in the box, and they go straight into the stock housing on RS, LS, GS, Special Edition, GS-R, and US Type R.

What It Is and Why It Works

The trade here is paper against oiled cotton, and it's worth being honest about both sides. Honda put a disposable paper element in this airbox. It filters fine dust well, it clogs, and you throw it away every service. E-2427 is layered oiled cotton gauze you wash and re-oil. K&N rates the media at up to 99 percent overall efficiency and says it only needs cleaning every 50,000 miles under normal highway driving, both per manufacturer. It ships pre-oiled, so it goes straight in the box out of the bag.

What you give up is the oil-free part. Over-oil a cotton filter and you can put oil film on a hot-wire sensor, and then you're chasing a driveability problem the filter caused. Use the 1.56 oz (46 ml) re-oil amount K&N publishes for this filter, and keep the oil off the sealing surface. The included 1 oz of grease is for the neck, not the cotton. If you'd rather not think about oil at all, stay with paper. If you'll clean it properly, this is the correct 1.8L Integra filter and it's the last one you buy for the car.

Set your expectations on power honestly. A drop-in sitting in a stock Integra airbox doesn't make horsepower you can feel. The restriction is the box and the snorkel, not the element inside it. Buy this because you're tired of replacing paper, not because you expect a dyno result. K&N backs stock-replacement High-Flow filters with a No-Hassle Lifetime Limited warranty. Limitations apply.

Specs

Fitment

Factory engine airbox only, and this is not a cabin filter. There is no 1999 US Integra Type R. Acura skipped that year, so a 1999 Type R badge is not a US ITR. K&N lists Honda Integra Type R 1998-2001 on this same number. That car is a Honda-badged export Integra, not a US Acura. A 1990-1993 Integra is a different generation and a different airbox. Any Civic uses a flat panel. A 2023 and newer Integra 1.5 takes K&N 33-5120. The Type S 2.0 takes 33-5139. If you're not sure, pull the old filter: a tall round with an angled neck about 8 inches high is this part. A flat panel is the wrong car.

What to Know Before You Buy

You'll have this in the box in a few minutes. Pop the airbox lid, wipe the housing clean, and seat the angled flange all the way. Use the included grease on the sealing surface so it doesn't pull dirty air around the edge. Don't oil the cotton until a service. The filter leaves K&N already oiled.

When it's time to wash it, use K&N cleaner and K&N oil. Their 99-5000 service kit has both in one box. Dry-filter spray is the wrong bottle. Wash it, let it dry all the way, then oil it to the 1.56 oz spec. Extra oil doesn't filter better, and it can fog a MAF. The most common way people ruin one of these is putting it back in wet.

Confirm the engine and the box before you order, not just the badge. If the car is a 2023 Integra, a Civic, or a 1990-1993 Integra, this is the wrong SKU. If the intake was swapped for a short ram or a cone, that kit came with its own filter and this drop-in does nothing for you. And if you came here looking for the thing that stops the cabin smelling stale, that is a cabin filter behind the glovebox, a separate part. This is the engine air filter for a stock 1994-2001 Integra airbox.