Photography by Mark Halvorsen
GM rolled out its redesigned HDs earlier this year, so we thought it would be cool to get a hold of one and then do some simple Fantastic Four upgrades to the intake, exhaust, suspension, and wheels and tires. The new HDs certainly look fresh, but they share more with their last-gen versions than you think. The suspension in the '07 HD is essentially the same as the '06 models, which means the aftermarket manufacturers only have to update the labeling on their lifting and lowering kits. We went with a 6-inch suspension lift kit from Bulletproof Suspension that was already in existence for the '06 models. The Duramax 6.6L diesel in the '07 HD is certainly new, if nothing else than for its aggressive, EPA-mandated emissions controls. Rolling Big Power (RBP) provided an aftermarket exhaust system to replace the OE system. At the other end, we nabbed a Volant intake system. Toyo was chosen for a set of 35-inch tires and the new 20x10-inch wheels came from RBP. The gents at 714 Motorsports in Westminster, California, installed the products onto the truck for us. Shall we begin?
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Here is the Volant kit laid out before we started installing it.
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A before shot of the 6.6L engine compartment in its stock glory.
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The Volant airbox slid into the empty space that used to be occupied by its OE equivalent.
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The silicone sleeve was slipped over the factory tubing that leads to the throttle body. T
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At the other end of the intake, the conical filter was dropped into the airbox and secured
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After that, the logoed lid was screwed tightly to the airbox, and then the mass airflow se
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Here are the RBP and factory exhaust systems. RBP's 4-inch exhaust was designed to fit on
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After removing the factory exhaust, the RBP turbo downpipe was installed right after the t
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