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Powerflow Pickup Truck Exhaust Systems for Ford Powerstroke, Dodge Cummins and GM Duramax
Why buy the POWERFLOW exhaust system?
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POWERFLOW
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THE COMPETITION
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Precise fit, no need to hammer or "adjust" anything
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Hammering, prying and "tweaking" required
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Remetalized, coated weld area, no premature rust on seams
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Uncoated welds rust
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Deburred 1/2" rod hangers, no sharp edges or burrs (33% thicker)
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3/8" wire hangers, rough sharp edges
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Welded double saddle, flattened bolt hangers, won't crush pipe
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Open saddle, round bolt hangers crush pipe
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All brackets are zinc plated to prevent rust
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Raw steel rusts
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POWERFLOW uses AccuSeal™ clamps to join pipes together, these don't crush the pipes, exhaust joints are serviceable
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Round bolt clamps crush tubes together, requires cutting or hammering to service
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All tubes are deburred and cleaned, no sharp edges or saw chips
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Non-deburred ends, sharp edges and saw chips
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Beautiful durable chrome tip with a polished stainless clamp that follows the OE angles
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No chrome, angles out, not OE style
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Shipped in 1 heavy duty box to reduce freight costs and damage
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Multiple boxes and unboxed pipe
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Bottom line, a MUCH better kit overall. Fit, finish and quality makes the POWERFLOW kit a better value
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A little bit cheaper on price, a LOT cheaper on quality
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Powerflow Exhaust Kit
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Powerflow Exhaust Pipes are made in a variety of shapes.
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Compare OUR clamp on the right with their clamp on the left.
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After one season in the snow and ice you can see that our clamp on the right still looks as good as new.
Our competitor's clamp on the left has succumbed to the effects of salt and calcium chloride on the road.
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PART NUMBER
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DIAMETER
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APPLICATION
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PS-9497-A4
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4"
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94 - 97 FORD 7.3 POWERSTROKE
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PS-99-A4
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4"
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99 - 02 FORD 7.3 POWERSTROKE
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PS-99-A5
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5"
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99 - 02 FORD 7.3 POWERSTROKE
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PS-6.0-A4
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4"
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03 - 05 FORD 6.0 POWERSTROKE
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PS-6.0-A5
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5"
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03 - 05 FORD 6.0 POWERSTROKE
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DC-9402-A4
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4"
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94 - 02 DODGE 5.9 CUMMINS
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DC-9402-A5
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5"
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94 - 02 DODGE 5.9 CUMMINS
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DC-0304-A4
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4"
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03 - 05 DODGE 5.9 CUMMINS
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DC-0304-A5
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5"
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03 - 05 DODGE 5.9 CUMMINS
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GM-0004-A4
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4"
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00 - 05 GM 6.6 DURAMAX
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POWERFLOW Systems come COMPLETE and will fit all wheel bases. No need to stock extra part numbers, boxes and loose tubes.
Our 5" kits are 4" to the muffler then 5" out the back of muffler to tip. Polished stainless tip included now, not chrome.
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This patented state-of-the art technology produces additional horsepower and torque, increases fuel mileage AND is QUIET on V8 diesels (only marginal gain on 5.9 Cummins). This muffler enhances the performance MORE if you're going to modify the ECM.
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7.3 L FORD POWERSTROKE
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MUFFLER
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STOCK ECM
HP / TORQUE
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HYPERTECH
PROGRAMMABLE BOX
HP / TORQUE
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Stock Powerflow
QPM-639
Gain
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185
190
5
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315
331
16
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208
218
10
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376
397
21
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6.0 L FORD POWERSTROKE
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MUFFLER
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STOCK ECM
HP / TORQUE
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BULLYDOG POWERHOUND
2-STAGE BOX
HP / TORQUE
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Stock Powerflow
QPM-639
Gain
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232
232
-
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375
378
3
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324
338
14
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455
505
50
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PART NO.
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INLET
ID
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OUTLET
ID
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LENGTH
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QPM-639-4
QPM-639-5
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4"
4"
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4"
5"
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39"
39"
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*On a chipped 5.9L cummins 0 HP & 6lbs. of torque was gained.
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These are longer than our standard Powerflow muffler and tubing will need to be cut.
Tests are done on a Dynojet Dyno; 80°F - 82% humidity.
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THRU BED VERTICAL STACK KIT
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Easy-to-install kit gives your pick-up that "BIG RIG" look!
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PART NO.
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DIAMETER
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DPU-4SK
DPU-5SK
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4"
5"
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Everything included except chrome stacks. This kit has a 4" ID inlet under the cab.
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A 36" stack will get to the top of the cab. Longer or shorter is available.
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DIA.
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LENGTH
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TOP
STYLE
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PART NO.
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4"
5"
4"
5"
4"
5"
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36"
36"
36"
36"
36"
36"
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CURVED
CURVED
MITRE
MITRE
STRAIGHT
STRAIGHT
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K4-36SBC
K5-36SBC
P4-36SBC
P5-36SBC
S4-36SBC
S5-36SBC
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POWERFLOW exhaust kits are made by GRAND ROCK, one of the premier large diameter truck exhaust manufacturers in the country. Many others just buy parts from all over and package their kits.
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