Main >> Marine Products >> IMCO Exhaust >> PowerFlow Plus IMCO- Powerflow Plus POWERFLOW PLUS High performance marine engines are growing in size...510, 540, 572 c.i. displacement motors and larger, naturally aspirated and blown, are becoming increasingly popular. But, until now, there hasn't been an efficient or affordable high performance marine exhaust system specifically engineered to accommodate these 'monster motors'. The answer, however, is IMCO's totally new "PowerFlow Plus" cast aluminum, fully water-jacketed exhaust manifolds. Available in black or polished.      Black manifolds and risers are hard-coat anodized inside and out to withstand the tough marine environment. The new "PowerFlow Plus" features IMCO's innovative patented design with 33" internal runners and a new ultra hi-flow exhaust riser (custom stainless steel tailpipes and integrated mufflers available). Is it possible that a cast aluminum water-jacketed exhaust manifold can match or exceed the power output of racing style dry-stack collector headers? YES!! PowerFlow Plus Manifolds PART # DESCRIPTION PRICE PF-80 PLUS-B PF-80 PLUS-P Black Manifold (pair) Polished manifold (pair) $1873 $1964 PowerFlow Plus 30° Risers PART # DESCRIPTION PRICE PF-82 PLUS-B PF-82 PLUS-P PF-82K PLUS-B PF-82K PLUS-P Black 30° Risers (pair) Polished 30° Risers (pair) Black Manifolds/30° Risers (pair) Polished Manifolds/30° Risers (pair) $940 $1013 $2813 $2977 PowerFlow Plus 85° Risers PART # DESCRIPTION PRICE PF-84 PLUS-B PF-84 PLUS-P PF-84K PLUS-B PF-84K PLUS-P Black 85° Risers (pair) Polished 85° Risers (pair) Black Manifolds/85° Risers (pair) Polished Manifolds/85° Risers (pair) $940 $1013 $2813 $2977 PowerFlow Plus 90° Risers PART # DESCRIPTION PRICE PF-85 PLUS-B PF-85 PLUS-P PF-85K PLUS-B PF-85K PLUS-P Black 90° Risers (pair) Polished 90° Risers (pair) Black Manifolds/90° Risers (pair) Polished Manifolds/90° Risers (pair) $940 $1013 $2813 $2977 PowerFlow exhaust systems have been tested on hi performance engines from 600-1300 h.p. in both super charged and naturally aspirated engines. A major break through, cast aluminum manifolds and risers with the power to match or exceed anything produced and the reliability to last through the years. PowerFlow Plus exhaust systems are used by major racing teams and prominent engine builders, to list a few. Racing Teams Engine Builders Crave the Wave Banker  In-M'Ocean  Rain-X  No Stress Express  Magic Potion  Kids Stuff V-81 B-7  A-11 A-711  A-40  B-9  M-40 Paul Pfaff  Teague Custom Marine  Flagship Marine  Troy Dennis  Larry's Engine & Marine  Automotive & Marine Specialities  G.T. Performance