Flowmaster Exhaust Muffler 40 Series Delta Flow (MPN: 9425400) Fluid & Filters utilizing custom-built mounting brackets that

utilizing custom-built mounting brackets that allow for a bolt-on setup with minimal or no drilling required

Manufacturer Part Number: 521-710

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1969-1969 GMC C35/C3500 Pickup

Flowmaster Exhaust Muffler 40 Series Delta Flow (MPN: 9425400) Fluid & Filters utilizing custom-built mounting brackets thatAdvanced Delta Flow technology for enhanced performance and sound control. The Flowmaster Exhaust Muffler 40 Series Delta Flow features a two chamber design that utilizes advanced Delta Flow technology. This innovative design enhances exhaust scavenging, resulting in improved performance while minimizing interior sound levels. The muffler produces a milder exterior tone and reduces interior resonance compared to standard 40 series models, making it