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4' helmet hose connects to most helmet fresh air intakes with standard 1-1/4" connector
200" cup depth - mount them virtually anywhere
5/8 in Hose Barb or 3/4 in Hose Barb
Each intake runner should be matched to the cylinder head port size or Fel-Pro gasket #1206 on all four sides of runner exit
1975-1981 Chevrolet P20
Flowmaster 70 Series Big Block II Muffler - 3" Center Inlet/Outlet Rear End Gear Oil 4' helmet hose connects toThe 70 series utilizes Flowmaster's patented Delta Flow technology and an enlarged case for improved sound control along with mileage and power gains. Perfect for use on trucks, SUV's, RVs, tow vehicles and high performance street cars where space allows. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability. Features: Durable Fully Welded 16 Gauge Aluminized Steel 3 Year Limited Warranty Stock to Mild Exterior Exhaust
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