Underground Racing Twin-Turbo Installation Overview

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.