K&N Custom Air Filter Assemblies are designed with the racer in mind. They incorporate good looks as well as the superior air flow that you expect from K&N. K&N Custom Air Filter Assemblies are designed for use with any engine that uses a round element air cleaner housing. They incorporate our famous K&N Air Filters and provide more air flow than other assemblies of this type. Available in 4 different designs, the perfect assembly is sure to be found here. Each complete assembly comes with base, element, and top plate.
K&N Custom Air Filter Assemblies are designed with the racer in mind. They incorporate good looks as well as the superior air flow that you expect from K&N. K&N Custom Air Filter Assemblies are designed for use with any engine that uses a round element air cleaner housing. They incorporate our famous K&N Air Filters and provide more air flow than other assemblies of this type. Available in 4 different designs, the perfect assembly is sure to be found here. Each complete assembly comes with base, element, and top plate.
K&N Custom Air Filter Assemblies are designed with the racer in mind. They incorporate good looks as well as the superior air flow that you expect from K&N. K&N Custom Air Filter Assemblies are designed for use with any engine that uses a round element air cleaner housing. They incorporate our famous K&N Air Filters and provide more air flow than other assemblies of this type. Available in 4 different designs, the perfect assembly is sure to be found here. Each complete assembly comes with base, element, and top plate.
K&N Custom Air Filter Assemblies are designed with the racer in mind. They incorporate good looks as well as the superior air flow that you expect from K&N. K&N Custom Air Filter Assemblies are designed for use with any engine that uses a round element air cleaner housing. They incorporate our famous K&N Air Filters and provide more air flow than other assemblies of this type. Available in 4 different designs, the perfect assembly is sure to be found here. Each complete assembly comes with base, element, and top plate.
Last updated at 05/08/2026 03:48:05
K&N E-3730 High Performance Replacement Round Air Filter
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
K&n E-3730 Universal High Flow Reusable Red Cotton 14" Dia. Round Air
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
K AND N ENGINEERING Air Filter E-3730
Delivery between Sun – Tue $22.18
K&N FILTER AIR FILTER SEE APPL.GUIDE [E-3730]
Delivery between 15–21 May $70.74
K&N E-3730 Mustang Air Filter Round 14"X4"
Delivery between Sat – Thu $5,548.43
K AND N ENGINEERING Air Filter E-3730
Free delivery between 14–22 May
K&N E-3730 Round Air Filter
Free delivery between 14–22 May
K&N Engineering K&N Custom Round Air Filter 14in OD 12in ID 4in Height E-3730
Delivery between Sun – Wed $138.71
K&N Custom Round Air Filter 14in OD 12in ID 4in Height
Free delivery between Sun – Tue
K&N Custom Round Air Filter 14in OD 12in ID 4in Height
Delivery between 11–21 May $66.51
| Air Filter Material | Cotton Gauze |
| Product Style | Round Air Filter |
| Filter Re-Oiling Amount | 2.25 oz (67 ml) |
| Product Box Width | 4.38 in (111 mm) |
K&N E-3730 High Performance Replacement Round Air Filter
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
K&n E-3730 Universal High Flow Reusable Red Cotton 14" Dia. Round Air
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
K AND N ENGINEERING Air Filter E-3730
Delivery between Sun – Tue $22.18
K&N FILTER AIR FILTER SEE APPL.GUIDE [E-3730]
Delivery between 15–21 May $70.74
K&N E-3730 Mustang Air Filter Round 14"X4"
Delivery between Sat – Thu $5,548.43
| Air Filter Material | Cotton Gauze |
| Product Style | Round Air Filter |
| Filter Re-Oiling Amount | 2.25 oz (67 ml) |
| Product Box Width | 4.38 in (111 mm) |
