Billet Oil Filler Cap for the 2013-2016 FR-S and 2013-2020 BRZ

The HKS Billet Oil Filler Cap for the 2013-2016 Scion FR-S, 2013-2020 Subaru BRZ, and 2017-2019 Toyota 86 replaces the factory plastic oil filler cap with a machined billet aluminum unit. The cap provides a secure, positive seal and the billet construction resists the oil and heat exposure that the factory plastic cap is subjected to over time. The HKS branding on the cap is visible in the engine bay and coordinates with other HKS engine bay accessories.

Specs & Highlights

• Billet aluminum construction
• Machined from solid aluminum billet
• HKS branding
• Positive seal design
• Resistant to oil and heat
• Fitment: 2013-2016 Scion FR-S / 2013-2020 Subaru BRZ / 2017-2019 Toyota 86

Billet Aluminum, FA20-Specific Thread, Heat and Oil Resistant

The oil filler cap is a detail piece in the engine bay that is visible on every oil service and whenever the hood is open. The billet aluminum material is more durable than the factory plastic and the machined finish looks correct alongside other engine bay modifications.

Engine Bay Detail for HKS-Built FA20 Applications

Direct replacement for the OEM cap. Thread specification is FA20-specific. Verify fitment with the listed model years before ordering as the cap thread pitch may differ on later production variants.

The FT Breakdown

The billet oil cap is the small engine bay detail that costs almost nothing and looks right alongside HKS engine covers, intake systems, and other underhood work. It is not a performance part. It is a quality part for a build where the engine bay details matter. The anodized aluminum construction is what separates this from the plastic OEM cap — not because plastic is a bad material for a filler cap, but because the metal cap carries no risk of cracking from thermal cycling and oil contact over time. On a frequently serviced engine where the cap is removed and reinstalled regularly, the durability difference accumulates over years of use.