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Rattletrap Jeep: A Custom 5.9L 12V Twin Turbo Cummins Diesel Jeep JK

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Presented by The Garage Performance Parts and Accessories

Project Rattletrap by Martin Barkey Racing Products (MBRP) spent nearly a year and a half building the ultimate Cummins Jeep. This monster Rattletrap Jeep boasts a Twin Turbo 5.9-Liter 12-Valve Cummins engine in a JK body rolling on 44×19.5 Pit Bull Rocker Tires. The Frame and suspension were both designed and built by Jason At kat Kustoms in New Knoxville, OH.  At an estimated 500+ Horsepower with 1000+ ft-lbs of Torque, Rattletrap will be giving you plenty of bragging rights; from its rugged exterior to its more luxurious interior options heads turn wherever Rattletrap goes.

From the dense forests and swamps in Muskoka, Ontario, Canada to the treacherous obstacle courses in Moab Utah and the tropical island of the Dominican Republic Rattletrap has proven itself to be a powerful unstoppable beast!

If you’re looking to start your own collection or add the finishing touches, Rattletrap is the piece to make it happen. This 2007 Jeep JK has had its body lengthened, frame stretched and widened to compensate for the powerful 6BT-12V Cummins. When you walk up to Rattletrap you will see her Sporting a customized roof; Rigid Industries lighting products 360 around the truck, River Raider tube fenders,  Off Camber Fabrications Front stubby bumper package with a 9500lbs Ramsey winch and a fully Line-X body spray.

When you open the door  to her customized interior you’ll notice four racing buckets with 5 point harness’s, full interior roll cage, onboard air, handgun lockable case under the steering wheel as well as shot gun holder in the back, onboard communication system by Rugged Radios and so much more. Climb up, turn the key to start the 12V Cummins and you will feel how the name “Rattletrap” was developed.  It’s raw rugged interior and 24 inches of travel makes this the ultimate custom Jeep. Wherever Rattletrap seems to venture a crowd will form. Most have only had the chance to see it in media or visualized in a video game but you, yes you could be the next proud owner of this iconic Jeep!

Below is a fully detailed list of every part and accessories as to what makes this the legendary Rattletrap.


Suspension and Steering
  • Summit Machine large Jimmy Joint rod ends throughout the suspension
  • Summit Machine threaded tube adapters & jam nuts
  • Suspension control arms are 2-1/4” x .250 wall DOM lower links & 2” x .250 wall upper links
  • Pure Performance 2-5/8” Prodigy Coil-Over Shocks, 16″ Rear travel, 14″ Front travel
  • Daystar Products Stinger bump stops
  • Northwest Fab high steer arms w/ 6 stud mounting
  • High steer arms modified to tie into steering knuckle tie rod mount & positions tie rod for high clearance
  • Custom tie rod& drag link w/ Summit Machine small Jimmy Joint rod ends
  • Custom pitman arm with rod end support for steering gear sector shaf
  • Speedway Engineering 1-3/4” x 48 spline sway bars & arms
  • 1997 12 Valve Cummins 6BT- approximately 500+HP/ 1000+ lb/f torque
  • MBRP 4” 304 Stainless Steel Exhaust System with single 5″ mitre cut Black Stack
  • BD Diesel #5 Fuel plate
  • BD Diesel AFC Spring Kit
  • BD Diesel Delivery Valve Kit
  • BD Diesel 50 hp Fuel injectors
  • BD Diesel 4000 RPM Governor Spring Kit
  • BD Diesel Super B Twin Turbo Kit
  • Fab Shop custom built stainless steel exhaust header
  • Boyd Welding custom fuel cell- 17 gallon, mounted behind rear axle
  • K&N air filter
  • Custom Rear Mounted Griffin Radiator and Electric Fan System
  • Custom Griffin Air to Air Intercooler
  • MBRP 304 Stainless Steel tubing to plumb rear radiator to engine
  • MechMan 250 amp High volt Alternator
  • NV4500 5 Speed Manual Transmission
  • Advance Adapters Atlas 2 Speed Transfer case w/ 3.8 low range ratio
  • Currie Enterprises built Dana 60 high pinion front axle- 3.54 ratio, 35 spline alloy shafts
  • Eaton Detroit Locker rear differential
  • AxleTech International Portal Gearbox drive hubs- 1.5 ratio for 5.31 overall axle ratio
  • VanCo Hydra-boost power brake unit
  • All stainless steel braided brake hoses & hard line
  • J.E Reel 1410 series rear driveshaft
  • Custom Four-link Suspension parallel 4 link front w/ track bar, triangulated 4 link rear
  • Integrated center skid plate to protect drivetrain & provide a smooth slide-able underside.
  • Eibach dual rate 3” ID coil springs
  • PSC Motorsports Hydraulic Assist Steering- ported JK gearbox, 1-3/4”x10” assist cylinder, pump,& remote reservoir
  • Mastercraf suspension limiting straps
  • Fass Fuel Systems Titanium 150 GPH fuel pump
  • Engine is mounted on custom motor mount cross member. Firewall cut & rebuilt around Cummins engine-
  • Southbend Clutch Dual Disc Clutch kit
  • Southbend Clutch 1-3/8” upgrade transmission input shaft
  • Southbend Clutch Heavy Duty hydraulic upgrade
  • Eaton ELocker front differential
  • Currie Ent. built Dana 70HD rear axle- 3.54 ratio, 35 spline alloy shafts
  • Currie Ent. Fabricated Differential Covers- front & rear
  • Wilwood Brake Calipers (dual front caliper setup)
  • J.E Reel 1350 series front CV driveshaft
  • High Angle Driveline driveline mounted parking brake (on rear output of transfer case)
  • front seats also utilized original seat belts for optional use
  • Seats & harnesses installed on custom tubular mounts connected to roll cage
  • Auto Meter Ultra-Lite Gauges
  • 3-3/8″ Speedo& 2-1/16” Coolant temp, oil press, fuel level, & volts fit into factory dash w/ custom panel
  • S Pod Lighting control panels
  • Off Camber Fabrications By MBRP Front stubby winch bumper package
  • Off Camber Fabrications By MBRP Grill Guard
  • Ramsey 9500lb Winch
  • JW Speaker LED Headlights
  • Off Camber Fabrications By MBRP Windshield light mounts
  • 1 Pair Rigid Industries Dually Spot Lights
  • Off Camber Fabrications By MBRP Windshield light bar mount
  • Off Camber Fabrications By MBRP Rock Rails
  • Off Camber Fabrications By MBRP Rear winch bumper package
  • River Raider tube fenders
  • Pitbull Rocker tires 44×19.50-20LT- including full-size bed cage mounted spare
  • Full interior roll cage from 1-3/4” x .120” DOM tubing
  • Cage passes through body floor & connects to frame in 12 locations with urethane bushings
  • Cage is built & fit behind original Jeep dash w/ supports that pass through the firewall & attach to front shock hoops.
  • This means the roll cage is integrated into the Jeep frame from front to rear for excellent structural strength & protection.
  • Mastercraf Baja RS custom suspension seats and 5 point Safety Harnesses
  • 2-5/8” Tach & 2-1/16” pyrometer & boost mounted to A-pillar of interior roll cage w/ Auto Meter roll cage gauge pods
  • American Autowire Highway 22 Wiring Harness
  • Ididit tilt steering column
  • Ansani Designs fiberglass hood
  • Stazworks 20×12 custom Double bead lock wheels w/ rock rings
  • Powertank CO2 Air System
  • Rear bed cage can be unbolted to allow removal of fiberglass top
  • Rugged Radios onboard communication system

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