K&N Filter Top Style 4" BCNR33 Monoloc's hardened chrome-moly steel construction

Monoloc's hardened chrome-moly steel construction will provide years of service

The custom silicone construction of the COBB Turbo Inlet rejects high engine bay temperatures and keeps the intake air closer to ambient temperature

choose a kit engineered for perfect fitment and durability

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1L GSL-SE 86-91 Mazda RX-7 1

K&N Filter Top Style 4" BCNR33 Monoloc's hardened chrome-moly steel constructionAir Filter Shape Oval TaperedHeight 5 in (127 mm)Package Contents 1 Air FilterPackage Quantity 1Washable YesAir Filter Material Cotton GauzeProduct Style Unique Universal Air FilterFlange Inside Width 4 in (102 mm)Flange Inside Length 6. 25 in (159 mm)Flange Length 1 in (25 mm)Flange Type CenteredFlanges 1Base Outside Length 7. 75 in (197 mm)Base Outside Width 5. 5 in (140 mm)Top Outside Length 6. 25 in (159 mm)Top Outside Width 4 in (102 mm)Top Style