Description
The Mishimoto MMBK-F2D-03HL is a direct-fit silicone hot side, lower boot built with Mishimoto’s DuraCore technology specifically for the 6.0L Ford Powerstroke. This boot kit replaces the factory pipe (part number 6C3Z-6C640-B) that is prone to failure, giving your Powerstroke’s air intake system a durable, precision-engineered upgrade.
Every Mishimoto silicone diesel boot is built around DuraCore, a synthetic inner-layer material that resists heat, pressure, fuel, and oil better than standard silicone, helping prevent the leaks and blowouts that shorten the life of a factory air intake system. Because a reliable air intake depends on tight, leak-free connections between components, this boot is engineered to keep air moving efficiently through the hot side of the intake system, which Mishimoto notes helps improve airflow, power, and EGTs. To lock that seal in place, the kit ships with Mishimoto’s own constant-tension T-bolt clamps for accurate, consistent holding power. Whether you’re chasing more consistent EGTs or simply replacing a tired factory boot in your air intake system, this kit is designed to deliver years of dependable service and is backed by the Mishimoto Lifetime Warranty.
Vehicle Applications
This hot side lower silicone boot is a direct fit for the 2003–2005 Ford Excursion in Eddie Bauer, Limited, and XLT trims, plus the 2004–2005 Excursion XLS. It also fits the 2003–2007 Ford F-250 Super Duty in XL, XLT, and Lariat trims, along with the 2004–2007 F-250 Super Duty King Ranch and Harley-Davidson Edition. Coverage carries over to the 2003–2007 Ford F-350 Super Duty in XL, XLT, Lariat, and King Ranch trims, and the 2004–2007 F-350 Super Duty Harley-Davidson Edition. Rounding out the fitment are the 2003–2007 Ford F-450 Super Duty XL, XLT, and Lariat trims (with the F-450 Base covered for 2003–2004), and the 2003–2007 Ford F-550 Super Duty Base, XL, XLT, and Lariat trims.
Features
- Direct fit for the 2003-2007 6.0L Powerstroke
- Replaces weak factory pipe (part number 6C3Z-6C640-B)
- Improves airflow, power, and EGTs
- DuraCore technology provides superior resistance to heat, pressure, fuel, and oil
- Includes high-quality constant-tension T-bolt clamps
- Backed by the Mishimoto Lifetime Warranty
Specifications
- Brand: Mishimoto
- Part Number: MMBK-F2D-03HL
- Material: Silicone with DuraCore
- Color: Black
- Clamps Included: Yes
- Universal or Specific Fit: Specific
- Grade Type: Performance
- Maximum Temperature Rating: 428
- Purchase Includes: (1) Hot Side, Lower Silicone Boot with DuraCore technology, (2) Constant-Tension T-Bolt clamps, (1) Mishimoto Lifetime Warranty
- Installation Torque Specs: 27 in-lbs (3NM) recommended for all T-bolt and constant-tension T-bolt clamps; operating range 18-35 in-lbs (2-4NM); do not exceed 35 in-lbs (4NM) maximum
Frequently Asked Questions
What role does this boot play in the air intake system?
It connects components on the hot side of the 6.0L Powerstroke’s air intake system, and Mishimoto notes that it helps improve airflow, power, and EGTs while its DuraCore lining resists heat, pressure, fuel, and oil to prevent leaks and blowouts.
What is included in the kit?
One hot side, lower silicone boot with DuraCore technology, two constant-tension T-bolt clamps, and the Mishimoto Lifetime Warranty.
Which vehicles does this boot fit?
It fits the 2003–2005 Ford Excursion, 2003–2007 Ford F-250 and F-350 Super Duty, 2003–2007 F-450 Super Duty, and 2003–2007 F-550 Super Duty across the trims and year ranges listed in the Vehicle Applications section.
What material is the boot made from and what is its temperature rating?
The boot is black silicone with DuraCore technology and carries a maximum temperature rating of 428.
What is the recommended installation torque for the clamps?
Mishimoto recommends 27 in-lbs (3NM) for all T-bolt and constant-tension T-bolt clamps, with an operating range of 18-35 in-lbs (2-4NM); do not exceed 35 in-lbs (4NM).
Does this kit replace the factory pipe?
Yes, it replaces the factory pipe with part number 6C3Z-6C640-B.
âš WARNING (California Proposition 65): This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
