John Williams, owner of Impulse Off-Road in St. George, Utah [(801) 599-1609], took this well-used 2008 JK Wrangler Unlimited and built it into a vehicle its owner, Mark Harms, can be proud of. Before Mark could take delivery of his “new” JK, it was going to the SEMA Show.
John rolled the red Unlimited into his shop, stripped the old parts off, and cleaned up the frame, underbody, etc. He then proceeded to install the Currie RockJock 60 front and rear ends, Teraflex 4-inch LCG Long Arm suspension, body armor, and much more. John took the Jeep to the crew at Adventure Innovations so they could expertly install their Adventure Innovations supercharger with Diablo Sports programmer. John reported the drive back from Adventure Innovations shop in California was a blast. The blower woke up the 3.8L V-6!
The JK was finished the night before the SEMA Show started and spent a week in Las Vegas. Mark picked it up after the show and continues to put it in harm’s way (sorry). Most show vehicles work well in only one place — the showroom. This SEMA JK works so well it’s hard to believe it was built to be in the SEMA Show. Check out the photos to see all that was done to build this exceptional Unlimited.
JK 3.8L V-6s are reliable...
JK 3.8L V-6s are reliable and gutless. This one isn’t gutless. Adventure Innovations installed its supercharger with Diablo Sports programmer to wake up the little mill. The exhaust features high flow catalytic converters and mufflers. To keep it cool in the desert, a Drake aluminum radiator was installed. Drake aluminum coolant overflow and windshield washer bottles, aluminum-coolant and engine-oil caps, and hood latches were also installed.
John Williams fabricated the...
John Williams fabricated the Impulse Off-Road aluminum tie rod and drag link, using Teraflex ends. The Currie RockJock 60 frontend has 5.38 gears and an Eaton Detroit Locker, protected by a Currie thick diff cover. A PSC ram assist steering system makes steering easy, even in the rocks. A finned aluminum power steering cooler adds volume and keeps fluid cool. The Poly Performance track bar brace mounts the track bar exactly where it needs to be.
Teraflex long lower control...
Teraflex long lower control arms mount up out of the way. They feature Clevite bushings on the frame ends that isolate vibration and noise.
Teraflex 4-inch coils, SpeedBumps,...
Teraflex 4-inch coils, SpeedBumps, Icon 2.5-inch shocks, and Currie AntiRock swaybar with aluminum arms handle vehicle dynamics up front. Teraflex’s coil rates are eerily perfect.
The Rubi-Crawler fits any...
The Rubi-Crawler fits any 2003-and-up TJ or JK with the 42RLE automatic overdrive tranny. It directly replaces the tailhousing, so the transmission/transfer case combo isn’t any longer or shorter than it was.
The Advance Adapters Rubi-Crawler...
The Advance Adapters Rubi-Crawler replaces the stock 42RLE tailhousing with a six gear planetary 2.72:1 low-range reduction box. The bolt-in doubler couples to the stock Jeep NVG241OR Rock-Trac (or a NP231 or Atlas) transfer case. The RubiCrawler increases available gear ratios allowing you to gear the Jeep to the terrain in which you’re ’wheeling.�Driving his SEMA JK, Mark can choose 10.88 crawl, 4.0 low, 2.72 mid-low, or 1:1 ratios.
Tom Wood’s Custom Driveshafts...
Tom Wood’s Custom Driveshafts built the front and rear CV propshafts.
The rear RockJock 60 has 5.38...
The rear RockJock 60 has 5.38 gears and an ARB Air Locker covered by a Currie thick cover. The Icon 2.5-inch piggyback reservoir shocks have compression and rebound adjusters.
Side armor includes Poison...
Side armor includes Poison Spyder Customs Crusher Corners, Crusher Flares, and Teraflex rocker guards.
John Williams is an expert...
John Williams is an expert at installing Katzkin leather seat covers in JK Wranglers.
The Expedition One rear bumper...
The Expedition One rear bumper carries the weight of the spare on the bumper, but opens using the JK tailgate latch in one motion.
A Warn 9.5ti winch with winchline.com...
A Warn 9.5ti winch with winchline.com rope is mounted on an Impulse Off-Road JK front bumper.
The 18x9 Black Rock Scorpion...
The 18x9 Black Rock Scorpion wheels have 38x14.50R18LT BFGoodrich Mud Terrain KM2 tires mounted on them.