Flowmaster Super 44's True Duals

Loud and snappy. Its almost ear peircing when you stand behinde the truck. I love it. 1989 Scottsdale 305ci bored 30 over. (310ci) True Duals. No Cats Mild Cam Stock Manifolds. 700R4 (stock) flowmaster super 44 duals.

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Flowmaster Super 40 vs Super 44?
This is my Silverado. I am debating installing the Super 40's or the Super 44's. What do you think? The engine is a 86-95 350ci block, four bolt mains, roller cam. Bored .040" ZZ4 rotating assembly, Speed Pro H345NCP-40 pistons 10.7:1 static compression, .032" Quench/Squish height. Patriot 'Vortec' 185cc heads, 2.02"/1.6" valves, Beehive springs. Comp XR276HR-10 cam, 1.52 rockers. Air-Gap dual plane, 1" four hole tapered spacer, Mighty Demon 750cfm annular Boosters. MSD ignition, Summit dist dialed in for 36 degrees @ 3000rpm. 18 degrees initial. +12 vacuum advance on manifold vacuum.





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1989 Chevy Scottsdale with a Flowmaster 40 series (outside)
Startup and a few revs on my 89 chevy scottsdale




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