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7.4L Duramax Buildup: The Chevy 454 Returns

As a 1,300hp Duramax diesel

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The 454ci big-block gasoline V-8 may be one of the most coveted, recognizable powerplants ever cast by General Motors. Its large displacement and big bore gave it the kind of low-rpm power a small-block owner could only dream of. Back in the '70s and '80s, the 454ci (7.4L) GM big-block separated the men from the boys.

Today, another engine, also built by the General, is changing the diesel enthusiasts' world: the 6.6L (403ci) Duramax. With common-rail direct-injection, aluminum cylinder heads, six head bolts per cylinder, and turbocharging as standard equipment, it's the powerplant of choice for many hot-rodders, drag racers, and sled pullers alike. And-just like in the days of old-the die-hard Duramax fans are after the same thing: horsepower.

When we heard a rumor that the folks at Fleece Performance Engineering were putting together a 454ci (7.4L) Duramax, we had to see it for ourselves. So we headed to its shop in North Salem, Indiana, to get a look at a one-of-a-kind engine built to be used in a 3.0 Class sled pulling rig. If this is any indication of how Fleece's new, big-block, Duramax engine program will operate, the Cummins camp will definitely have its hands full.

SOURCES
ARP
1863 Eastman Avenue
Ventura
CA  93003
800-826-3045
www.arp-bolts.com
Bosch
38000 Hills Tech Drive
Farmington Hills
MI  48331
248-876-1000
www.bosch.com
Banks Power
546 Duggan Avenue
Azusa
CA  91702
866-738-5915
www.bankspower.com
Fleece Performance Engineering
2463N 625W
North Salem
IN  46165
855-839-5040
www.fleeceperformance.com
Industrial Injection
1201 South 700 West
Salt Lake City
UT  84104
800-955-0476
www.industrialinjection.com
SoCal Diesel
27833 Avenue Hopkins
Suite #6
Valencia
CA  91355
661-775-5620
www.socaldiesel.com
Mahle Motorsports
Fletcher
NC
888-255-1942
www.mahlemotorsports.com
Carrillo
124 Poplar Pointe Drive Unit #104
Mooresville
NC  28117
704-664-2515
www.cp-carrillo.com
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