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MagnaFlow Sys C/B 03 GM 1500 Silverado 5.3L V

Magnaflow · New

MagnaFlow Sys C/B 03 GM 1500 Silverado 5.3L V

MPN 15778 · Store SKU mag15778

$965.00
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Supplier stock checked 11/7/2026, 9:17:37 AM UTC. Adding a part does not reserve it.

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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 Street Series Cat-Back Performance Exhaust System 15778 brings out the personality of your Truck with our signature resonant, powerful engine tone and dyno-proven performance. Thanks to its fast-flowing, mandrel bent 3in. main piping and 1 Straight-Through mufflers ending in a Single Passenger Side Rear exit with 4in. Polished Welded-On Single Wall Angle Cut Rolled Edge tips, this Truck exhaust kit has the performance chops to match its sporty sound and appearance. Upgrade your ride to the next level with an exhaust that has the pipes to put other Truck's to shame. With this system your vehicle will be producing Moderate exterior and Mild interior sound levels while leaving other cars and trucks feeling envious at every stoplight. Exhaust kit 15778 features a cat-back layout that replaces your ride's stock exhaust components from near the catalytic converter on back. Extensive 3D scanning during development has resulted in a direct-fit design that you can easily install yourself. 15778 is produced using CNC precision robotic manufacturing techniques and is backed by MagnaFlow's 1-year limited finish warranty and limited lifetime construction warranty. Magnaflow Street Series Stainless Cat-Back System Street Series Stainless Cat-Back System Street Series Polished Cat-Back System

Manufacturer fitment & guides

Check 15778 against the manufacturer’s application information below.

Part-specific notes

  • Emissions acknowledgement required before purchase.
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