C10 With A 40 Series Flowmaster.

C10 with a 40 Series Flowmaster.

77 C10 w Complete Exhaust & Flowmaster 40s

Magic Muffler & Brake

Flowmaster 40 series Exhaust (Chevrolet C10 350v8)

Busted Knuckle Garage

Flowmaster Super 40 Series Muffler Sound Test

Speedway Motors

1972 Chevy C10 Cheyenne 350 V8 TRUE DUAL EXHAUST w/ LONG TUBE HEADERS & FLOWMASTER 40 SERIES!

Exhaust Addicts

1985 Chevy Pickup with 40 Series Flowmaster Dual Exhaust System!

A1A Exhaust Tech

Flowmaster 40 Series vs Borla Pro XS on SBC 350

3rd Gen C10’s (3rd Gen C10’s)

84 chevy c10 flowmaster 40 s

72 Chevy C10 327 Flowmaster Series 40 muffler rev.

Chevy C10 - 250 Inline 6 - Flowmaster 40 Series

Cammed 350 Flowmasters 40 series!! Squarebody

1963 Chevy C10 TRUE DUAL EXHAUST w/ FLOWMASTER 40 SERIES!

Exhaust Addicts

Flowmaster 40 Series Mufflers on chevy c10

SDI Performance

1965 Chevy C10 350 V8 w/ HEADERS & FLOWMASTER 40 SERIES!

Exhaust Addicts

Flowmaster 40 series vs Super 10's

84 C10 Flowmaster 40’s

I Swapped My Flowmaster 40 Series For A 50 Series !

Earl's Repair & Restore

84 Chevy C10 dual flowmaster 40 series

C10 Muffler Sound Off!!! Flowmaster, Thrush, Magnaflow, Knock Offs and Customs!!!

3" Flowmaster 40's vs Delta Flow 50's - Big Block Chevelle