Product Description
MBRP UA1007 3.5" ID TO 4" OD STAINLESS EXHAUST ADAPTER is a universal reducer/expander built to handle diesel exhaust duty. Constructed from stainless steel, it bridges a 3.5-inch inner diameter tube to a 4-inch outer diameter section for clean transitions, improved sealing, and easier custom fabrication.
Fitment
- Universal exhaust fabrication: adapts 3.5" ID to 4" OD sections
- Ideal for custom turbo-back systems, stack setups, and service repairs on light- and heavy-duty diesel applications
- Material: Stainless steel (corrosion resistant)
Cross-Reference / Alternatives (MBRP only)
- MBRP UA2001 – 4" ID to 5" OD (Aluminized)
- MBRP UA2003 – 3.5" ID to 5" OD (Aluminized)
- MBRP UA2004 – 4" ID to 5" ID (Aluminized)
- MBRP UA2005 – 3.5" OD to 5" ID (Aluminized)
- MBRP UA2007 – 3.5" ID to 4" OD (Aluminized)
- Shop All MBRP
Helpful Notes
- Confirm ID vs OD on your mating pipes before ordering.
- Use quality band clamps or lap-joint clamps to prevent leaks and hot spots.
FAQ
Is UA1007 truly universal?
Yes—UA1007 adapts 3.5" inner-diameter tubing to 4" outer-diameter sections and works across many custom diesel exhaust setups where those sizes are used.
What’s the material and why choose it?
UA1007 is stainless steel for excellent corrosion resistance and longevity versus plain steel in harsh road conditions.
Do I need special clamps?
We recommend torque-rated band or lap-joint clamps sized to your pipes. Always verify fit before tightening to spec.
Will this fit my specific truck model?
It’s a universal adapter. Fitment depends on your current pipe sizes (3.5" ID to 4" OD). Measure your system to confirm.
