Custom Harley Rocker Motorcycle - 2012 GMC Sierra

At this point, Cody really loved his truck, but it still didn't have the neck-snapping power he desired. This is when Injected Speed Shop in Ft. Smith, Arkansas, came to the rescue. Chris Brewer and Robbie Bryant tore the 6.2L down to the bare block. They started by stroking the engine out to 416 ci and boring the heads. Then, using all forged components, they rebuilt the engine. Manley dish pistons with Hellfire rings were dropped into each cylinder and connected to Probe Industries rods and a Manley 4340 crank. Comp Cams was used for the camshaft, lifters, and pushrods. Jim Parkison came in and applied a custom laptop tune, and on the engine dyno, the LS pumped out 650 hp and 600 lb-ft of torque at the crank.

When the weather is nice, Cody can let his hair out and cruise on his matching Procharger-powered custom Harley Rocker.

When the weather is nice, Cody can let his hair out and cruise on his matching Procharger-

Finally, Cody has a ½-ton gas truck under his belt. Not only does Cody use it to haul his matching Harley Rocker to shows all over the country, he drives the tires off it day in and day out. He wanted to send a special thanks to B&C Offroad, Oklahoma Customs, Injected Speed Shop, Josh Bray, and everyone else that helped make this his idea a reality.

Inside the Build

Year Make Model: 2012 GMC Sierra
Owner and City/State: Cody Elkins • Weatherford, Oklahoma

Engine:
Type: 416ci LS
Heads: Ported and polished LS
Cam: Comp cams
Induction: Procharger P-1SC-1
Exhaust: Magnaflow 4-inch
Fuel System: 60-pound GM injectors
Engine Management: Custom tune by Jim Parkison
Output: 650 hp and 600 lb-ft
Built by: Injected Speed Shop, Fort Smith, Arkansas

Chassis:
Front suspension: 3rd Coast spindles and control arms, Fox Racing coilovers
Rear suspension: 3rd Coast four-link with Watt's link, Fox Racing shocks
Brakes: SSBC four-piston calipers with 16-inch drilled and slotted rotors