4" OD Mass Air Flow Adapter Flange – For Duramax LB7 LLY LBZ – Aluminum – PerformanceMRP

Building a custom intake for your Duramax?

This 4-inch OD mass air flow adapter flange from PerformanceMRP is what you need.

Made in USA, aluminum construction.

Fits Duramax LB7, LLY, LBZ.

Perfect for custom cold-air setups.

Includes mounting hardware.

No warranty, but it's a solid piece.

If you're fabbing an intake tube, this lets you mount the factory MAF.

Performance/custom part.