Air Oil Separator Complete Install Kit

This complete install kit includes all the necessary components to mount or refresh your Crawford Performance air oil separator for proper engine oil circulation. Designed for a range of compatible canisters and vehicle applications, it provides brackets, clamps, and hardware for a clean, reliable installation.

New to the AOS? Why your Subaru needs an Air/Oil Separator.

If the engine's already hurt, an AOS won't fix it. Start with the engine guide, then see your block options.

Read the original guide: All about Subaru's Original Air Oil Separator & Why You Need One — why an AOS matters, and why Crawford's is the original.

Install kit contents

Each kit is the complete mount and refresh hardware set for its canister — hoses pre-cut to the lengths in that unit's Crawford install instructions. Pick your kit by the base SKU of your AOS.

Install Kit: S06131 (S06131K) — Crosstrek 2.0 / Impreza 2.0 Baja, WITHOUT Power Blocks

• H0470 3/8" PCV hose, pre-cut 20" x1
• H0470 3/8" PCV hose, pre-cut 12" x1
• B0013 mounting bolt, M8 1.25 x 110mm x2
• B0407-3-R 70mm stand-off x1
• B0407-2-R 45mm stand-off x1
• Factory clamps are reused

Install Kit: S06132 (S06132K) — Crosstrek 2.0 / Impreza 2.0 Baja, WITH Power Blocks

• H0470 3/8" PCV hose, pre-cut 20" x1
• H0470 3/8" PCV hose, pre-cut 12" x1
• B0013 mounting bolt, M8 1.25 x 110mm x2
• B0407-1-R 25mm stand-off x1
• Factory clamps are reused

Install Kit: S06121 (S06121K) — Outback 2.5 / Legacy 2.5i / Forester 2.5i

• H0470 3/8" ventilation hose, pre-cut 21" x1
• H0470 3/8" ventilation hose, pre-cut 16" x1
• B2032 mounting bolt, M6 x 16mm x2
• N0592 mounting nut, M6 x2
• Factory clamps are reused

Install Kit: S06924 (S06924K) — Forester 2.5 Baja / Crosstrek 2.5 Baja

• H0479 5/8" ventilation hose, pre-cut 25" x1
• H0479 5/8" ventilation hose, pre-cut 13" x1
• B2032 bolt, M6 x 20mm x2
• N0592 flange nut, M6 x2
• Factory clamps are reused

Install Kit: S0698-CT (S0698CTK) — Crosstrek XV

• H0470 3/8" PCV hose, pre-cut 36" x1
• H0470 3/8" PCV hose, pre-cut 15" x1
• B2033 mounting bolt x1
• N0593 U spring nut x1
• Z0108 8" zip ties x6

Install Kit: S0698-OB (S0698OBK) — Outback 2.5 Baja 2013–2014

• H0470 3/8" PCV hose, pre-cut 36" x1
• H0470 3/8" PCV hose, pre-cut 15" x1
• B2033 mounting bolt x1
• N0593 U spring nut x1
• Z0108 8" zip ties x6

Install Kit: S06141 (S06141K) — Ascent V3

• H0478 1/2" vent hose, pre-cut 27" x1
• H0479 5/8" vent hose, pre-cut 29" x1
• H0485 7/8" vent hose, pre-cut 21" x1
• H0485 7/8" vent hose, pre-cut 29" x1
• C0250-2 S/S worm clamps x8
• Z1074 zip ties x2
• No bracket or bolts — mounts on factory intercooler hardware

Shipping: Carrier rates apply.

Already running a Crawford AOS? Hoses and hardware wear over time — refresh it with a new install kit every 3–5 years.