Weapon-R® - Air Flow Meter Adapter Kit with Secret Weapon Air Filter

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1991 Mazda 323
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Product Details

Mazda 323 1991, Air Flow Meter Adapter Kit with Secret Weapon Air Filter by Weapon-R®. Installing this kit will increase the airflow into your engine and increase performance. It replaces the OEM air filter assembly with an open element intake system.


  • Increased engine airflow for low cost
  • Includes the revolutionary Secret Weapon Air filter
  • Integral velocity stack increases engine airflow
  • Polyurethane foam flows more air and traps more dirt than conventional filters
  • All Weapon-R foam air filters are backed by the Weapon-R Million Mile warranty


  • Air Flow Meter Adaptor
  • Secret Weapon Air Filter
  • Coupler
  • 2 Clamps
  • Bracket Kit
  • Small Filter Cleaner Solution

This kit allows you to remove the restrictive OEM air box from your vehicle. The adapter mounts to your air flow meter and allows you to install the Secret Weapon air filter. The heart of this filter is a computer designed and flow bench tested velocity stack, which greatly increases airflow, airspeed and air mass into the engine. The Polyurethane foam used in Secret Weapon air filters flows up to 80% more air and has better dirt filtration than conventional cotton filters. The resultant increased airflow significantly improves engine performance. And the Secret Weapon air filter even provides superior airflow when it’s dirty. The filter element doesn’t clog because the Open Cell Technology foam allows air to flow around the captured dirt.

The Secret Weapon air filter disassembles easily for cleaning, and cleaning is easy because the filter element never needs oiling. All Weapon-R foam air filters are backed by the Weapon-R Million Mile warranty.

Weapon-R® makes high quality performance parts, at affordable prices, for sport compact cars. All products are carefully designed using the latest computer simulation and modeling techniques, followed by extensive dyno testing. Finally, all parts are rigorously street and race tested to make sure they’ll perform flawlessly in your car. Weapon-R draws on over a decade’s experience, involvement in various forms of motor sports, and their commitment to research and development, to bring you the highest quality and best value performance parts in the industry.

Part Number:


Weapon-R® products are covered by a Limited Lifetime Warranty, during which its products are warranted to be free from defects in material or workmanship. This Warranty does not apply to any products that have been subjected to misuse, mishandling, misapplication, neglect (including but not limited to improper maintenance), improper installation, or alterations.

The Warranty is granted to the end-user and applies to products which are purchased, installed, and used for the purposes for which they are originally designed. This Warranty covers defects arising under normal use and does not cover malfunctions or failures resulting from misuse, abuse, neglect, improper installation, or incorrect maintenance.

During the Warranty period, Weapon-R will repair or replace, at no charge, a product that is defective in materials or workmanship. Weapon-R reserves the right to either repair or replace a defective component at its discretion and reserves the right to substitute an equivalent product under the terms of this Warranty.

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

BMW 3-Series
1996 BMW 318i
1995 BMW 318i
1994 BMW 318i
1993 BMW 318i
1992 BMW 318i
1991 BMW 3-Series
  • 1.6L / 1.8L / 2.0L / 2.3L / 2.5L
1990 BMW 3-Series
  • 1.6L / 1.8L / 2.0L / 2.3L / 2.5L
1989 BMW 316i / 318i / 318is / 320i / 325i / 325is / 325iX / M3
1988 BMW 316i / 318i / 320i / 325 / 325es / 325i / 325is / 325iX / M3
1987 BMW 316 / 318i / 320i / 320is / 325 / 325e / 325es / 325i / 325is / 325iX / M3
1986 BMW 318i / 320i / 325 / 325e / 325es / 325i / 325iX / M3
1985 BMW 316 / 318i / 320i / 323i / 325e / 325i / 325iX
1984 BMW 3-Series
1983 BMW 316 / 318i / 320i / 320is / 323i
BMW 5-Series
1988 BMW 528e
1987 BMW 528e
1986 BMW 528e
1985 BMW 528e
1984 BMW 528e
1983 BMW 528e
1982 BMW 528e
BMW 6-Series
1989 BMW M6
1988 BMW M6
1987 BMW M6
Ford Escort
2000 Ford Escort
  • LX
1999 Ford Escort
  • LX / SE / SE Equi
1998 Ford Escort
  • LX / SE / SE Equi
1997 Ford Escort
1996 Ford Escort
1995 Ford Escort
1994 Ford Escort
1993 Ford Escort
1992 Ford Escort
1991 Ford Escort
Ford Probe
1997 Ford Probe
  • 2.0L
1996 Ford Probe
  • 2.0L
1995 Ford Probe
  • 2.0L
1994 Ford Probe
  • 2.0L
1993 Ford Probe
  • 2.0L
1992 Ford Probe
  • 2.2L
1991 Ford Probe
  • 2.2L
1990 Ford Probe
  • 2.2L
1989 Ford Probe
Isuzu I-Mark
1989 Isuzu I-Mark
1988 Isuzu I-Mark
1987 Isuzu I-Mark
1986 Isuzu I-Mark
1985 Isuzu I-Mark
Isuzu Impulse
1992 Isuzu Impulse
1991 Isuzu Impulse
1990 Isuzu Impulse
Lexus ES
1995 Lexus ES
1994 Lexus ES
1993 Lexus ES
1992 Lexus ES
1991 Lexus ES
1990 Lexus ES
Mazda MX3
1995 Mazda MX3
  • 1.6L
1994 Mazda MX3
  • 1.6L
1993 Mazda MX3
  • 1.6L
1992 Mazda MX3
  • 1.6L
Mazda MX6
1992 Mazda MX6
1991 Mazda MX6
1990 Mazda MX6
1989 Mazda MX6
1988 Mazda MX6
Mazda Miata
1993 Mazda Miata
1992 Mazda Miata
1991 Mazda Miata
1990 Mazda Miata
Mazda RX-7
1989 Mazda RX-7
1988 Mazda RX-7
1987 Mazda RX-7
1986 Mazda RX-7
1985 Mazda RX-7
Mazda 323
1994 Mazda 323
1993 Mazda 323
1992 Mazda 323
1991 Mazda 323
1990 Mazda 323
1989 Mazda 323
1988 Mazda 323
1987 Mazda 323
1986 Mazda 323
Mazda 626
1997 Mazda 626
  • 2.0L
1996 Mazda 626
  • 2.0L
1995 Mazda 626
  • 2.0L
1994 Mazda 626
  • 2.0L
1993 Mazda 626
  • 2.0L
1992 Mazda 626
1991 Mazda 626
1990 Mazda 626
1989 Mazda 626
1988 Mazda 626
Toyota 4Runner
1995 Toyota 4Runner
1994 Toyota 4Runner
1993 Toyota 4Runner
1992 Toyota 4Runner
1991 Toyota 4Runner
1990 Toyota 4Runner
1989 Toyota 4Runner
1988 Toyota 4Runner
1987 Toyota 4Runner
1986 Toyota 4Runner
1985 Toyota 4Runner
Toyota MR2
1995 Toyota MR2
1994 Toyota MR2
1993 Toyota MR2
1992 Toyota MR2
1991 Toyota MR2
1990 Toyota MR2
1989 Toyota MR2
1988 Toyota MR2
1987 Toyota MR2
1986 Toyota MR2
1985 Toyota MR2
Toyota Pick Up
1995 Toyota Pick Up
1994 Toyota Pick Up
1993 Toyota Pick Up
1992 Toyota Pick Up
1991 Toyota Pick Up
1990 Toyota Pick Up
1989 Toyota Pick Up
1988 Toyota Pick Up
1987 Toyota Pick Up
1986 Toyota Pick Up
1985 Toyota Pick Up



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Weapon-R® - Air Flow Meter Adapter Kit
Weapon-R® - Air Flow Meter Adapter Kit with Secret Weapon Air Filter
Average Rating: 5 of 5
5 of 5
this product is great
Weapon-R® - Air Flow Meter Adapter Kit with Secret Weapon Air Filter
i love it could feel the power of the weapon R thank and i will be getting more products from you guys
Posted by (Saakatoon, SK) / 1991 Mazda 626
Was this review helpful for you? YesThis review was helpful for 2 users!
Low Prices Price match guarantee
Guaranteed Fitment Always the correct part
In-House Experts We know our products
Easy Returns Quick & Hassle Free

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