Magnaflow · New
MagnaFlow 01-05 Chevy/GMC Duramax Diesel V8 6.6L 4 inch System Exhaust Pipe
MPN 15398 · Store SKU mag15398
Supplier stock checked 11/7/2026, 6:56:37 AM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
The MagnaFlow Performance Exhaust Diesel Turbo Downpipe 15398 is a 3in. diameter mandrel bent stainless steel pipe designed to connect near your turbocharger and is weight-optimized with superior flow characteristics and performance. Each performance pipe is produced using precision CNC robotic manufacturing techniques and features 100% durable, corrosion resistant stainless steel construction. Professional installation is highly recommended. Magnaflow Direct-Fit Exhaust Pipe Direct-Fit Exhaust Pipe
Manufacturer fitment & guides
Check 15398 against the manufacturer’s application information below.
Part-specific notes
- Not CARB approved. Destination and intended-use restrictions must be checked before sale.
- Emissions acknowledgement required before purchase.