K&N 81-0802 Air-Oil Separator for 2018-23 Ford Mustang GT/Mach 1 5.0 L V8

Vehicle Fitment

• 2018-2023 Ford Mustang GT 5.0 L V8, RWD
• 2021-2023 Ford Mustang Mach 1 5.0 L V8, RWD
• 2019-2020 Ford Mustang Bullitt 5.0 L V8, RWD

Features

• Captures crankcase blow-by oil vapors before they enter the intake tract
• Helps prevent power loss and premature detonation by removing oil contamination
• Large 6 oz capacity reservoir for extended intervals between servicing
• Quick 30-minute bolt-on installation using factory-style hose connections
• Direct-fit design engineered specifically for the listed Mustang applications
• Durable aluminum body with black-finish and premium hoses for long-term durability
• No tools required to check or empty the reservoir - simple maintenance
• Backed by lifetime limited warranty for performance vehicle use

Specifications

• Reservoir capacity: approximately 6 oz (≈0.18 L)
• Tank material: aluminum, black finish
• Weight: approx. 2 lb (0.9 kg)
• Mounts in place of factory PCV/hoses with no drilling required
• Not legal for sale or use in California on pollution-controlled motor vehicles

Included Components

• 1x Oil separator reservoir assembly
• 2x Hose clamps
• 2x Premium OEM-style hose fittings (pre-installed)
• Instruction sheet with installation hardware

Product Description

The K&N 81-0802 Air-Oil Separator is designed for the high-performance 5.0 L V8 engines in the Ford Mustang GT, Mach 1 and Bullitt from 2018 through 2023. By capturing crankcase blow-by and preventing oil vapors from entering the intake, it protects the throttle body, cleans the intake tract, and helps maintain engine performance under spirited driving.

This product is ideal for Mustang owners who demand reliability and performance in their naturally-aspirated 5.0 L V8 engine, whether for street use, weekend performance driving, or track days. The direct-fit design ensures simple installation in approximately 30 minutes, using factory routing and no modifications. Routine maintenance only requires emptying the 6-ounce reservoir when full.

Please note: Fitment is confirmed through 2023 for the listed vehicles. Coverage for 2024-2025 is unconfirmed at time of listing. Ensure compatibility with your drivetrain (RWD) and engine (5.0 L V8) before purchase. This unit is not legal for sale or use in California on vehicles with stock emissions systems.