Description
The Mishimoto DuraCore Silicone Intercooler Boot, MMDCC-3540BK, is a black transition coupler engineered to bridge a 3.5-inch diameter on one end with a 4-inch diameter on the other. It’s part of Mishimoto’s DuraCore lineup of intercooler boots, a line built for fabricators who need the strongest possible link in a custom intercooler piping kit, and this transition-shaped unit is designed specifically for stepping between mismatched tube sizes.
Beyond its role connecting differently sized charge pipes, this boot brings real durability to a custom air intake system. DuraCore technology forms the innermost layer of the boot and delivers superior resistance to heat, pressure, fuel, and oil compared to standard silicone, which helps prevent leaks and blowouts under high-boost conditions. Each boot is built from five layers of silicone reinforced with heat-resistant embedded fibers, giving the piping in your air intake and intercooler system the structural integrity to hold up under sustained pressure rather than becoming the weak point in an otherwise solid build.
Vehicle Applications
This DuraCore transition boot is a universal-fit fabrication component rather than a vehicle-specific part; no particular make, model, or year is specified for this product. It’s intended for builders routing custom intercooler piping who need a 3.5-inch to 4-inch transition point, making it suitable for any project where that diameter step is required.
Features
- Transition-style coupler with a 3.5-inch inner diameter on one end and a 4-inch inner diameter on the other, allowing it to join mismatched piping sizes
- DuraCore synthetic innermost layer resists heat, pressure, fuel, and oil better than standard silicone, helping keep the connection leak-free and blowout-resistant under high boost
- Constructed from five layers of silicone reinforced with heat-resistant embedded fibers for structural integrity
- Coolant compatible
- Hose clamps are not included; Mishimoto recommends 1x MMCLAMP-CTWG-105 and 1x MMCLAMP-CTWG-117 Constant Tension Worm-Gear clamps
- Includes (1) coupler and is backed by the Mishimoto Lifetime Warranty
Specifications
- Brand: Mishimoto
- Part Number: MMDCC-3540BK
- Material: Silicone with DuraCore Technology
- Color: Black
- Coupler Style: Transition
- Inner Diameter: 3.5in and 4in
- Outer Diameter: 3.93in and 4.43in
- Maximum Temperature Rating: 330°F
- Coolant Compatible: Yes
- Hose Clamps Included: No
- Includes: (1) Coupler, Mishimoto Lifetime Warranty
Frequently Asked Questions
What diameters does the Mishimoto MMDCC-3540BK transition boot connect?
This boot has a 3.5-inch inner diameter on one end and a 4-inch inner diameter on the other, with outer diameters of 3.93 inches and 4.43 inches, letting it step between mismatched piping sizes in a custom intercooler build.
Are hose clamps included with this Mishimoto intercooler boot?
No, hose clamps are not included. Mishimoto recommends 1x MMCLAMP-CTWG-105 and 1x MMCLAMP-CTWG-117 Constant Tension Worm-Gear clamps.
What is DuraCore technology?
DuraCore is the synthetic material that forms the innermost layer of every Mishimoto silicone boot. It delivers superior resistance to heat, pressure, fuel, and oil compared to standard silicone, helping prevent leaks and blowouts under high-boost conditions.
Is the MMDCC-3540BK boot coolant compatible?
Yes, this boot is coolant compatible.
What is the maximum temperature rating for this boot?
The maximum temperature rating is 330°F.
What comes included when I order this coupler?
The package includes (1) coupler and is backed by the Mishimoto Lifetime Warranty.
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.
