The MBRP GMAL401 4" Aluminized Front Pipe is jig manufactured to ensure a perfect fit on your 2001-2004 GM 6.6L Duramax LB7. MBRP's mandrel-bend construction gives you smooth bends for enhanced flow. Constructed from heavy duty aluminized steel you can count on this pipe lasting for years to come.
- 4" Aluminized Steel Construction
- Increase Power & Efficiency
- Lower Exhaust Gas Temperatures
- Mandrel Bent & Jig Manufactured