Underground Racing's Lamborghini race modifications start with a dyno test of a customer's stock car. From there,

highly skilled technicians remove and bore out the engine slightly to accommodate steel cylinder linings. Next, the engine receives Carrillo billet steel connecting rods and CP aluminum pistons among other upgrades. Underground then installs its own aluminum cylinder heads and custom twin-turbo system, which features Precision ball-bearing turbos, TiAL Sport wastegates and blow-off valves, an air/water intercooler and a proprietary 3.5-inch stainless-steel exhaust system.

Depending on your particular taste for power, the custom performance package installed on your vehicle may vary from this particular listing. Further modifications include stronger rear driveshafts and reinforced CV joints, a Tilton Engineering triple-disc carbon clutch and flywheel, a GReddy electronic boost controller mounted in the glovebox, a triple adjustable Penske coil-over suspension, Motech or AEM electronics, a taller final drive ratio to increase top speed and a reworked transmission with new, hardened billet steel gears.

These vehicles fire up with a louder, meaner roar than stock cars, though not to an offensive degree. Under full throttle the acceleration is so unfathomable that it makes describing it a serious challenge. With boost turned down to 8-15 psi, rather than the 25-30 psi that is possible, and running on pump gas rather than race fuel, many people would not even realize they were seated in front of a street-legal rocket ready to blast-off at the push of a button. Underground provides a two-year/24,000-mile warranty-as long as customers use Mobil 1 oil exclusively.

Underground Racing's Twin-turbo System Features

  • Custom twin billet Precision Turbochargers
  • TiAL billet wastegates and billet blow off valves
  • Custom fabricated stainless steel exhaust using aircraft quality metal
  • Ultra lightweight stainless steel mufflers
  • Custom fabricated stainless steel air induction using aircraft quality metal
  • Custom Air/Water intercooler system with high flow water pump
  • Custom ice water reservoir
  • High flow intercooler water heat exchanger
  • Crankcase ventilation system
  • K&N air filters
  • Show quality polishing on turbo compressor, intercooler and charge piping.
  • Custom heat shielding and high quality heat wrap
  • Exhaust Finish Options:high temp heat coating or polished mirror finish
  • High quality silicone hose
  • High pressure T-bolt clamps for intake pressure tubes
  • High quality v-band clamps for exhaust connections
Fuel System Upgrades
  • Two custom billet fuel pump hangers with high flow fuel pumps
  • Custom aluminum fuel rails
  • All Aeroquip stainless steel fuel line and aluminum fittings
  • Aeromotive adjustable fuel pressure regulator
  • Upgraded fuel injectors

Engine Modifications Include

  • Aluminum Cylinder Heads
  • Full blue print and balanced race short block
  • Carrillo billet steel connecting rods
  • CP custom reverse dish aluminum race pistons
  • CP spiral locks
  • CP .180+ wall wrist pins
  • CP oil rail support
  • Custom steel cylinder sleeves
  • Main bearings
  • Rod bearings
  • Total seal TNT file fit rings
Tuning Upgrades
  • Motec or AEM Engine Management System
  • GReddy Electronic boost controller
  • Custom wiring harness
  • Professional dyno and streetability tuning
Additional Performance Upgrades
  • Penske Triple Adjustable Coil-over Suspension
  • Stronger Rear Driveshafts and Reinforced CV Joints
  • Tilton Engineering Triple-disc Carbon Clutch and Flywheel
  • Reworked Transmission
  • Hardened Billet Steel Gears
  • High-performance Wheels and Tires
  • Safety Equipment (Roll Cages & Parachutes)


Underground Racing's installation of high-performance upgrades includes a Two-year/24,000-mile Warranty with the use of Mobil 1 oil exclusively.