• Rail Blank - 1KD/ 1VD/4JJ1/YD25/4D56 - Common Rail Cowboys
  • Rail Blank - 1KD/ 1VD/4JJ1/YD25/4D56 - Common Rail Cowboys
  • Rail Blank - 1KD/ 1VD/4JJ1/YD25/4D56 - Common Rail Cowboys
  • Rail Blank - 1KD/ 1VD/4JJ1/YD25/4D56 - Common Rail Cowboys
  • Rail Blank - 1KD/ 1VD/4JJ1/YD25/4D56 - Common Rail Cowboys
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MCR

Rail Blank - 1KD - MCR

Rail Blank - 1KD - MCR

(1)

$185.00 AUD
$185.00 AUD
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💥 MCR Thailand Rail Blank – Denso Systems

 

Say goodbye to pressure drop-offs. The MCR Thailand Rail Blank replaces the factory relief valve to eliminate fuel bleed-off at higher rail pressures—giving you consistent fueling, sharper response, and the confidence to push harder on tuned diesels.

🚙 Fits Denso Fuel Systems
  • Toyota 1VD-FTV (V8 diesel)
  • Toyota 1KD-FTV – early models only (2005–08/2006)
  • Isuzu 4JJ1
  • Mitsubishi 4D56
  • Nissan YD25

Tip: If in doubt, confirm by VIN or the relief-valve style on your rail.

⚙️ Why Run a Rail Blank?
  • Eliminates mechanical pressure-relief valve failures
  • Allows higher and more stable commanded rail pressures
  • Prevents sudden fuel drop-outs under load
  • Essential on tuned or modified common-rail diesel engines
🔧 Install & Notes
  • Direct replacement for the factory rail relief valve; torque to manufacturer spec and check for leaks after priming.
  • Monitor commanded vs. actual rail pressure with a scan tool during testing.
  • Tuning strongly recommended so the ECU targets/manages rail pressure safely.
  • Use at your discretion: Intended for off-road/competition applications where allowed. Ensure the rest of the fuel system (pump, lines, injectors) is in good condition.
💳 Payment & 🚚 Shipping
  • Buy Now, Pay Later: Afterpay, Humm, Klarna & Zip
  • Free Express Shipping Australia-Wide – tracked, fast dispatch

❓ Frequently Asked Questions

Do I need a tune after installing a rail blank?
Highly recommended. A quality calibration will manage rail targets and safeguards so you get stable pressure without over-stress.
Will it trigger a fault code?
On some platforms the ECU may log a deviation if actual rail pressure differs from target. Proper tuning resolves this.
Does this fit all 1KD engines?
No—this is for early 1KD rails (approx. 2005–08/2006). Later rails use an electronic relief.
Is it safe for daily use?
When paired with sensible tuning and a healthy fuel system, it’s a common performance upgrade. Always observe legal requirements in your jurisdiction.
Lock in rail pressure and unlock your diesel’s potential.
Grab your MCR Rail Blank today — Free Express Shipping included.
MCR Thailand Rail Blank – Denso Systems MCR https://schema.org/VehiclePart Rail blank plug that replaces the factory relief valve on select Denso common-rail systems (1VD-FTV, early 1KD-FTV, 4JJ1, 4D56, YD25). Eliminates bleed-off at high rail pressure for stable fueling under load. Recommended with appropriate tuning. Toyota 1VD-FTV Toyota 1KD-FTV (early 2005–08/2006) Isuzu 4JJ1 Mitsubishi 4D56 Nissan YD25

 

 

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