ETi Titanium Oil Cap

Product Description

ETi Titanium Oil Cap for the FD3S — M35x4.0 thread spec for the 13B rotary, machined from Grade 5 Ti-6Al-4V billet. The detail piece that finishes a built engine bay.

Key Features

• Grade 5 Ti-6Al-4V titanium billet — aerospace spec, full strength rating.
• M35x4.0 thread — correct spec for the 13B rotary. Direct OEM thread match.
• Machined finish — not stamped, not cast. Proper billet construction.
• Knurled grip — hand-tighten without tools.
• O-ring seal — standard rubber seal, replaceable.

Why Upgrade

Stock FD oil caps are plastic and crack over time, especially on engines running hotter than factory spec. The titanium replacement never cracks, looks correct, and has the thread spec the rotary actually uses (M35x4.0 — unique to the 13B, not interchangeable with most JDM caps on the market).

Finish Options

• Burnt — heat-treated rainbow oil-slick finish.
• Black — stealth.
• Raw Polished — mirror polished bare titanium.
• Anodize — Purple, Gold, Silver, Green.

Fitment

• 1992-2002 Mazda RX-7 (FD3S) — 13B-REW
• FC RX-7 (13B series 4/5)
• M35x4.0 thread — verify before ordering

Shipping & Delivery

• In stock — 2-4 day processing
• Shipped worldwide via DHL or FedEx

Questions on thread spec or finish? DM us — we answer.