K&N® 33-2011 - 33 Series Panel Air Filter

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K&N® - 33 Series Panel Air Filter
K&N® - 33 Series Panel Air FilterK&N® - 33 Series Panel Air Filter Installation InstructionsK&N® - WarrantyK&N® - Air Filter Overview 602x420Made In USAK&N Authorized Dealer
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Product Details

Learn everything you want to know about this product
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K&N Air Filters

33 Series Panel Air Filter (33-2011) by K&N®. Air Filter Color: Red. Filter Material: Cotton Gauze. Filter Re-Oiling Amount: 0.99 oz (29 ml). Height: 0.719" (18 mm). Outside Length: 16.5" (419 mm). Outside Width: 5.75" (146 mm). Includes: 1 Air Filter. K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. We make over 1,200 different replacement air filters for the majority of vehicles on the road. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. With most vehicles you simply remove the disposable air filter and replace it with a K&N. See applicable instruction sheet for details. Our stock replacement air filters for street vehicles are covered by our famous K&N Million-Mile Limited Warranty and will be the last air filter your vehicle will ever need.

K&N - F.A.Q.K&N - Air Filter CleaningK&N - Warranty


  • Improves engine airflow
  • Increases horsepower and acceleration
  • Superior filtration without reduced airflow
  • Reduces maintenance costs
  • Washable and reusable
  • Get up to 50,000 miles between cleanings under normal driving conditions
  • Emissions legal in all States
  • Backed by K&N's Million Mile Limited Warranty

Most air filters on the market are a compromise. Many high-performance filters deliver better airflow, but sacrifice filtering ability and engine protection in the process. OEM filters, which are usually made of paper, filter adequately but at the expense of airflow. And airflow decreases as these air filters become dirty. Not so the K&N air filter. K&N air filters increase airflow without decreasing filtration ability, and the increased airflow remains consistent throughout the filter's service interval. The secret is in the K&N filter's construction.

K&N's initial goal was to develop a filter that would deliver increased airflow during dirty, dusty off-road racing conditions. Increased airflow improves the efficiency of the combustion process, increasing horsepower and torque. But just increasing airflow without ensuring adequate filtration under those conditions would result in a ruined engine. K&N's solution was a filter design consisting of 4 to 6 layers of cotton gauze sandwiched between two aluminum wire screens. The cotton is then treated with a specially formulated grade of oil that causes tackiness throughout the cotton’s microscopic strands. The resulting K&N filter not only delivers increased airflow while trapping dirt particles that could harm your engine, that level of airflow is maintained even as the filter gets dirty. The layers of oiled cotton fibers in the K&N filter trap dirt particles that are smaller than the holes in the filter media. The thickness of the layers also allows the K&N filter to trap dirt and dust on many levels, trapping more dirt without decreasing airflow. Contrast this with a paper filter that only traps dirt on its surface; as the surface area becomes clogged, the airflow rate goes down.

Each K&N air filter is custom designed to fit into your existing factory air box. The K&N filter is economical because it's the last air filter you'll have to buy for your car. It can be washed and reused many times, and since you can usually drive up to 50,000 miles between servicing, you won't have to clean it very often. And every K&N filter is backed by K&N's Million Mile Limited Warranty. By the way, check the CARiD reviews and read what the customers think of K&N porducts.

K&N® is the inventor and leading innovator of reusable cotton gauze filter technology for automotive applications. The first K&N filter was conceived for racing over 40 years ago and a performance enthusiast mindset continues today throughout all levels of the company. K&N is the sales and brand leader for performance filters, including an extensive line of factory replacement filters and performance air intake kits. The company actively promotes the environmental, economical and performance advantages of long-life reusable cotton gauze filters.

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Warranty Information

Find out everything you need to know about the product warranty

K&N O/E Replacement Air Filters and Air Intake Systems purchased from Authorized Dealers are backed by a Million Mile Limited Warranty when used primarily on paved roads and on vehicles for which they were designed. If one of these products ever fails to provide complete satisfaction, K&N will replace it.

K&N Aftermarket Air Filters should be cleaned every 50,000 miles for normal highway use, more often in dusty conditions. Cleaning should be done with K&N cleaner and air filter oil (or comparable air filter cleaner and oil). Use of compressed air, or chemicals not specifically designed to clean and re-oil cotton air filters (i.e. gasoline, transmission fluid, motor oil, lightweight oil, or diesel fuel) will void the warranty. Any damaged, abused or modified K&N Air Filters will not be warranted.

Any K&N product returned to K&N will need a Return Goods Authorization number and must be sent at customers' expense along with proof of purchase.

Any defective K&N Air Filter properly returned to K&N will be replaced. K&N reserves the right to determine whether the terms of the warranty, set out above, have been properly complied with. In the event that the terms are not complied with, K&N shall be under no obligation to honor this warranty. K&N will not be responsible for any indirect, consequential, special, contingent, or other damages.

We want to make sure that when you buy a K&N Lifetime Air Filter or Air Intake System, you can be confident your vehicle's warranty will not be impacted. We also want you to feel confident that even if you experience difficulties with a dealership repair department, we will step-in and resolve the issue, so you won't have to. Therefore, K & N makes the following Pledge: K&N pledges to their customers that they will not be taken advantage of and charged for a repair due to a manufacturer warranty denial blamed on the presence of a K&N product.

Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

Vehicle Fitment

This part is compatible with 60 vehicle(s)
Year Make Model Fitment Notes:
1995 Jaguar XJS
  • 6.0L
1994 Jaguar XJS
  • 6.0L
1992 Jaguar XJ-Type
  • 5.3L
1991 Jaguar XJ-Type
  • 5.3L
1990 Jaguar XJ12 / XJS
1989 Jaguar XJ12 / XJS
1988 Jaguar XJ-Type
  • 5.3L
1988 Lotus Esprit
  • CARB
1987 Jaguar XJ12
1987 Jaguar XJS
  • With Panel Filter 5.3L
1987 Lotus Esprit
  • CARB
1986 Jaguar XJ-Type
  • 5.3L
1986 Lotus Esprit
  • CARB
1985 Jaguar XJ-Type
  • 5.3L
1985 Lotus Esprit
1984 Jaguar XJ-Type
  • 5.3L
1984 Lotus Esprit
1983 Jaguar XJ-Type
  • 5.3L
1983 Lotus Esprit
1982 Jaguar XJ12 / XJS
1982 Lotus Esprit
1981 Jaguar XJ12 / XJS
1981 Lotus Esprit
1981 Triumph TR7
1980 Jaguar XJS
1980 Lotus Elite
1980 Lotus Esprit
1980 Triumph TR7
  • CARB
1979 Jaguar XJ12 / XJS
1979 Lotus Eclat
1979 Lotus Elite
1979 Lotus Esprit
1979 Triumph TR7
  • Except California Models
1978 Jaguar XJ-Type
  • CARB
1978 Jaguar XJ12 / XJS
1978 Lotus Eclat
1978 Lotus Elite
1978 Lotus Esprit
1978 Triumph TR7
  • Except California Models
1977 Jaguar XJ-Type
1977 Lotus Eclat
1977 Lotus Elite
1977 Lotus Esprit
1977 Triumph TR7
  • Except California Models
1976 Jaguar XJ-Type
1976 Lotus Eclat
1976 Lotus Elite
1976 Lotus Esprit
1976 Triumph TR7
  • Except California Models
1975 Jaguar XJ-Type
  • 4.2L / 5.3L
1975 Triumph TR7
  • Except California Models
1974 Jaguar XJ6
1973 Jaguar XJ-Type
  • 4.2L / 5.3L
1973 Triumph Stag
1972 Jaguar XJ-Type
  • 4.2L
1972 Jaguar XKE
  • 2 Required.
1972 Triumph Stag
1971 Jaguar XKE
  • 4.2L
1971 Triumph Stag
1970 Jaguar XKE
1968 Jaguar XJ
  • Series I / Series II / Series III
1967 Daimler Sovereign
  • 4.2L L6 258 CID 4235 CC

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