Description
The Mishimoto MMCP-3540BK is a black, 100-percent silicone transition coupler engineered to join sections of piping that step between a 3.5-inch and a 4-inch diameter. Molded in a straight transition shape, this coupler is built with heat-resistant embedded fibers so it can handle demanding underhood conditions where a simple rubber hose would fail.
Whether you are building out a cold air intake system, repairing a section of an existing air intake, or fabricating custom piping that needs a reliable diameter change, this Mishimoto silicone transition coupler gives you a durable connection point. As part of a broader air intake or piping setup, a well-made coupler like this helps maintain a secure, leak-resistant seal between components, which matters for anyone relying on a cold air intake filter or intake filter housing to move air efficiently. Because it is coolant compatible in addition to being suited for intake and piping duty, this coupler offers flexibility for builders working on cool air intake routing or other plumbing that sees both heat and pressure.
Vehicle Applications
This Mishimoto coupler is a universal-fit component rather than a part tied to a specific make, model, or engine code. It is designed to work anywhere a builder or installer needs to transition piping from a 3.5-inch diameter to a 4-inch diameter, making it a practical choice for custom cold air intakes, air intake systems, and other piping projects rather than a single-vehicle application.
Features
- 100-percent silicone construction
- Heat-resistant embedded fibers
- High heat and pressure tolerances
- Coolant compatible
- Straight transition shape for stepping between 3.5in and 4in piping
- Backed by the Mishimoto Lifetime Warranty
Specifications
- Brand: Mishimoto
- Part Number: MMCP-3540BK
- Product Type: Air Intake Systems / Silicone Coupler
- Material: Silicone
- Interior Material: Silicone
- Color: Black (also available in blue and red)
- Shape: Straight Transition
- Coupler Style: Transition
- End 1 Inside Diameter: 3.5 in
- End 1 Outside Diameter: 3.7 in
- End 2 Outside Diameter: 4.2 in
- Maximum Temperature Rating: 330°F
- Coolant Compatible: Yes
- Hose Clamps Included: No
Frequently Asked Questions
What sizes does the Mishimoto MMCP-3540BK transition coupler connect?
It is a silicone transition coupler measuring 3.5in to 4in, with a 3.5-inch End 1 inside diameter, a 3.7-inch End 1 outside diameter, and a 4.2-inch End 2 outside diameter.
What colors is this coupler available in?
The coupler is available in black, blue, and red; the MMCP-3540BK is the black version.
Is the Mishimoto MMCP-3540BK coolant compatible?
Yes, this silicone coupler is listed as coolant compatible.
Are hose clamps included with this coupler?
No, hose clamps are not included with the MMCP-3540BK.
What is the maximum temperature rating of this coupler?
It has a maximum temperature rating of 330°F.
What material is the coupler made from?
It is made from 100-percent silicone with heat-resistant embedded fibers, and the interior material is also silicone.
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.
