Magnaflow · New
MagnaFlow Sys T/B 99-03 Ford F-250/F-350 Super Duty 7.3L Diesel 4in Single Passenger Side Rear Exit
MPN 17878 · Store SKU mag17878
Supplier stock checked 11/7/2026, 3:53:26 PM 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 Custom Builder Pipe Series Turbo-Back Performance Exhaust 17878 utilizes a weight-optimized, emissions-legal design engineered to enhance your diesel truck with our signature resonant sound and dyno-proven performance. This turbo-back 4in. diameter Custom Builder Pipe kit is made of durable, corrosion resistant stainless steel and produced using CNC precision robotic manufacturing techniques, all backed by MagnaFlow's limited lifetime warranty. Exhaust kit 17878's mandrel bent pipes have been tuned to produce Aggressive interior and Very Aggressive exterior sound levels. The system terminates in a Single Passenger Side Rear exit. Professional installation is recommended due to the possible cutting, welding and fabrication required. The MagnaFlow Custom Builder Pipe Series Turbo-Back Performance Exhaust 17878 utilizes a weight-optimized, emissions-legal design engineered to enhance your diesel truck with our signature resonant sound and dyno-proven performance. This turbo-back 4in. diameter Custom Builder Pipe kit is made of durable, corrosion resistant stainless steel and produced using CNC precision robotic manufacturing techniques, all backed by MagnaFlow's limited lifetime warranty. Exhaust kit 17878's mandrel bent pipes have been tuned to produce Aggressive interior and Very Aggressive exterior sound levels. The system terminates in a Single Passenger Side Rear exit. Professional installation is recommended due to the possible cutting, welding and fabrication required. Magnaflow Custom Builder Pipe Kit Diesel 4in. Turbo-Back Custom Builder Pipe Kit Diesel 4in. Turbo-Back Custom Builder Kit
Manufacturer fitment & guides
Check 17878 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.
