Project Kics R40 Lug Nuts Review (12x1.25 16+4 Locks)

Subaru and Mitsubishi run M12x1.25 thread instead of the M12x1.50 used on most Hondas, Mazdas, and Toyotas. Project Kics makes the R40 set in the 12x1.25 variant ($195, 4.6 stars, 25 ratings) for builds in the Subaru-Mitsubishi-Lancer ecosystem.

TL;DR

If you have a Subaru WRX, STI, or Mitsubishi Evo, the 12x1.25 R40 set is the same premium-build Project Kics quality for your specific thread. Same anodized aluminum body, same hardened steel insert, same 16+4 lock configuration. The only difference from the 12x1.50 set is thread pitch.

Key Specs

• Thread: 12 x 1.25 (Subaru, Mitsubishi, certain JDM builds)
• Seat: 60-degree conical
• Material: Anodized aluminum body, hardened steel insert
• Set: 16 standard + 4 locks (typical 5x100 or 5x114.3 5-lug setup)
• Color: Black anodized
• Hex size: Slim 19mm
• Length: Slightly longer than OEM

Pros

• Right thread for Subaru/Mitsubishi platforms. Don't try to make 12x1.50 work on these cars — strip the threads.
• Same premium quality as 12x1.50 variant. Identical engineering across thread sizes.
• Closed-end design. Keeps water out of stud cavity — important in Subaru's all-weather usage.
• 4 included locks. Theft deterrence built into the set.
• Made in Japan. Project Kics QC is consistent batch-to-batch.

Cons

• Lower review count than 12x1.50 variant. 25 vs 43 reviews on Amazon. Not a quality concern; just less data.
• Slightly more expensive than 12x1.50. $195 vs $179. Difference is small but real.
• Verify your thread before ordering. Some Subarus migrated to 12x1.25 around mid-2000s; older STIs were 12x1.5. Check your studs.
• Premium pricing. Not budget — for show builds where lugs matter.

Who It's For

• Subaru WRX/STI owners verified at 12x1.25 thread with aftermarket wheels.
• Mitsubishi Evo owners doing visual hardware upgrade.
• Show-build cars where wheel hardware matters visually.
• Skip on Honda/Mazda/Toyota M12x1.50 thread cars (use the other R40 variant) or stock-wheel daily drivers.

Verify Thread Before Buying

Remove a factory lug. Measure threads or take to auto parts store:

• 12x1.5 = 12mm shaft, 1.5mm pitch (most Hondas)
• 12x1.25 = 12mm shaft, 1.25mm pitch (most Subarus, Mitsubishis)

Subaru thread varies by year and trim. WRX 2008-2014 was 12x1.25; older variants may differ. Confirm before ordering.

How It Compares

• vs Project Kics R40 12x1.50 16+4 ($179): Different thread, same build. Match to car's stud spec.
• vs Muteki SR48 12x1.25 (~$140): Muteki is the cheaper open-end alternative. Half the price, less premium.
• vs OEM Subaru lugs + McGard locks (~$60): OEM is functional but boring. R40 is the visual upgrade.

Bottom Line

The Project Kics R40 12x1.25 is the right premium lug nut for Subaru and Mitsubishi builds. Same Project Kics quality as the 12x1.50 variant — different thread, identical engineering. For show-tier WRX/STI/Evo builds, the $195 spend pays off in long-term hardware visibility.

Check the latest price on Amazon.