1999 BMW 323Ci 2.5L L6 Gas Air Intake
- Guaranteed to increase horsepower
- Designed to improve throttle response and engine sound
- Replaces entire factory air intake system
- Not legal for highway use in states adopting California emission regulations
- Washable and reusable lifetime air filter
- Lasts up to 100,000 miles before service is required (depending on driving conditions)
- Easy to install, usually in 90 minutes or less
- K&N No-Hassle Lifetime Limited Warranty
| Replacement Filter | RC-4470 |
| Air Filter Color | Red |
| Air Filter Material | Cotton Gauze |
| Air Filter Outlet Shape | Round |
| Clamps Included | 1 |
| Clamp Material | Steel |
| Clamp Style | Regular |
| Couplers Included | None |
| Type | Gen I |
| Product Style | 57i Series International Kits |
| Intake Pipe Color / Finish | Black |
| Intake Pipe Material | Flex Hose & Rubber Hose |
| Street Legal In All US States | No |
| TUV Approved (Europe) | No |
| Weight | 4.1 lb (1.9 kg) |
| Product Box Height | 9.13 in (232 mm) |
| Product Box Length | 9.13 in (232 mm) |
| Product Box Width | 9.13 in (232 mm) |
| California Restricted | Not legal for sale or use in California |
| Warranty | No-Hassle Lifetime Limited |
Easy Moderate Advanced
Wrench, Extension, Flat Blade Screwdriver, Allen Wrench
60-90 Minutes
Installation PDF
Installation Instruction Sheet Installation Instruction Sheet Horsepower Guarantee
- Guaranteed to increase horsepower and torque
- Roto-molded HDPE intake tube paired with oversized oiled cotton air filter
- Engineered to provide high airflow and exceptional filtration
- Replaces factory air filter and intake tube
- Filter only requires cleaning every 100,000 miles under normal highway driving conditions
- Typical installation can be completed in 60 minutes or less with simple hand tools
- No-Hassle Lifetime Limited Warranty™
- Will not void vehicle warranty
| Estimated Horsepower Gain | 8.66 HP @ 6300 RPM |
| Replacement Filter | RU-4690 |
| Air Filter Color | Red |
| Air Filter Material | Cotton Gauze |
| Air Filter Outlet Shape | Round |
| Clamps Included | 3 |
| Clamp Material | Stainless Steel |
| Clamp Style | Regular |
| CARB EO Number | D-269-28 |
| Couplers Included | 1 |
| Type | Gen II |
| Estimated Torque Gain | 7.2 lbft |
| Product Style | 57 Series FIPK |
| Intake Pipe Color / Finish | Black |
| Intake Pipe Material | High-Density Cross-Linked Polyethylene |
| Street Legal In All US States | Yes |
| TUV Approved (Europe) | No |
| Weight | 9.3 lb (4.2 kg) |
| Product Box Height | 12.25 in (311 mm) |
| Product Box Length | 20.25 in (514 mm) |
| Product Box Width | 12.25 in (311 mm) |
| Mounting Hardware Included | Yes |
| Warranty | No-Hassle Lifetime Limited |
Easy Moderate Advanced
Wrench, Extension, Flat Blade Screwdriver, Allen Wrench
60-90 Minutes
Installation PDF
Installation Instruction Sheet Horsepower Guarantee Dyno Chart - 1997 BMW M3 L6 3.2L F/I - 8.66HP Increase
- Guaranteed to increase horsepower and torque
- Roto-molded HDPE intake tube paired with oversized oiled cotton air filter
- Engineered to provide high airflow and exceptional filtration
- Replaces factory air filter and intake tube
- Filter only requires cleaning every 100,000 miles under normal highway driving conditions
- Typical installation can be completed in 60 minutes or less with simple hand tools
- No-Hassle Lifetime Limited Warranty™
- Will not void vehicle warranty
| Estimated Horsepower Gain | 9.69 HP @ 6090 RPM |
| Replacement Filter | RU-4730 |
| Air Filter Color | Red |
| Air Filter Material | Cotton Gauze |
| Air Filter Outlet Shape | Round |
| Clamps Included | 3 |
| Clamp Material | Stainless Steel |
| Clamp Style | Regular |
| CARB EO Number | D-269-31 |
| Couplers Included | 1 |
| Type | Gen II |
| Estimated Torque Gain | 8.4 lbft |
| Product Style | 57 Series FIPK |
| Intake Pipe Color / Finish | Black |
| Intake Pipe Material | High-Density Cross-Linked Polyethylene |
| Street Legal In All US States | Yes |
| TUV Approved (Europe) | No |
| Weight | 8.8 lb (4 kg) |
| Product Box Height | 12.25 in (311 mm) |
| Product Box Length | 20.25 in (514 mm) |
| Product Box Width | 12.25 in (311 mm) |
| Mounting Hardware Included | Yes |
| Warranty | No-Hassle Lifetime Limited |
Easy Moderate Advanced
Wrench, Extension, Flat Blade Screwdriver, Allen Wrench
60-90 Minutes
Installation PDF
Installation Instruction Sheet Horsepower Guarantee Dyno Chart - 2004 BMW 325i 2.5L - 9.69HP Increase
- Guaranteed to increase horsepower
- Designed to improve throttle response and engine sound
- Replaces entire factory air intake system
- Washable and reusable lifetime air filter
- K&N No-Hassle Lifetime Limited Warranty
- Lasts up to 100,000 miles before service is required (depending on driving conditions)
- Easy to install, usually in 60 minutes or less
| Replacement Filter | RU-4550 |
| Air Filter Color | Red |
| Air Filter Material | Cotton Gauze |
| Air Filter Outlet Shape | Round |
| Clamps Included | 3 |
| Clamp Material | Steel |
| Clamp Style | Regular |
| Couplers Included | 1 |
| Type | Gen II |
| Product Style | 57i Series International Kits |
| Intake Pipe Color / Finish | Black |
| Intake Pipe Material | High-Density Cross-Linked Polyethylene |
| Street Legal In All US States | No |
| TUV Approved (Europe) | No |
| Top Style | Chrome |
| Weight | 6.5 lb (3 kg) |
| Product Box Height | 12 in (305 mm) |
| Product Box Length | 18 in (457 mm) |
| Product Box Width | 12 in (305 mm) |
| California Restricted | Not legal for sale or use in California |
| Mounting Hardware Included | Yes |
| Warranty | No-Hassle Lifetime Limited |
Easy Moderate Advanced
Wrench, Extension, Flat Blade Screwdriver, Allen Wrench
60-90 Minutes
Installation PDF
Installation Instruction Sheet
