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45/40 Compound Twin Turbo

Model: 116454000 Manufactured by: Pacific Performance Engineering


PPE has designed the most comprehensive Twin Turbo Package on the market! We supply you with everything you need.

By designing the turbos to compliment each other we can deliver power from low - to high RPMs throughout the power band. The PPE 45/40 Compound Turbo Package is just the thing for customers who are serious about adding massive torque and horsepower to their Duramax.

Anyone looking to get their engine to produce big power that translates into pulling away from their competitors at the starting line, then look no further. The key is how the strengths of the Garrett GTX4508R and GT4094R are linked and then how both turbos work together at all times. Both turbos are made by Garrett and are oil, and water-cooled (just like the OEM turbo charger) and ball bearing to ensure they provide unparalleled reliability as well as drivability.

Each turbo has their own specialties and do their jobs very efficiently. The GT4094R spools-up quicker resulting in an excellent low to midrange power, but once the engine hits mid-range and above the TiAL Wastegate diverts more of the exhaust pressure to the GTX4508R. It is the GTX4508R which supplies the mid to high-end power that will really put your Duramax into overdrive.

PPE combines the turbos with a custom 3 inch intake bridge and features
a 4 inch crossover tube and Race High Flow Exhaust Manifolds with Up-Pipes. This combination provides the engine with drastically enhanced intake and exhaust actions which create an unrestricted flow for the dual turbo system. Speaking of flow, the PPE High Performance Intercooler cools the air before it is pumped into the engine via the 3 inch aluminum boost tubes. The result is a virtually seamless delivery of power that works especially well with PPE’s electronic and fuel upgrades.
The PPE compound turbo system does all that and still retains its A/C and heater functionality. This way, you can even be comfortable while smoking the competition!

    ▪ Garrett GTX4508R and GT4094R ball bearing-equipped,
       water, and oil-cooled turbo
    ▪ Race High Flow Exhaust Manifolds with Up-Pipes
    ▪ TiAL Wastegate
    ▪ Custom 3 inch intake bridge/4 inch cold tube
    ▪ PPE’s reinforced, High-Flow Performance Intercooler
    ▪ Seamless 3 inch aluminum intercooler tubes
    ▪ Aluminum coolant overflow reservoir
    ▪ Interlocking NO leak exhaust flanges
    ▪ Retains A/C and heater functions
    ▪ Triangulated mounting brackets, improved reliability

Available for *:    2004.5-2005 LLY
                              2006-2010 LBZ/LMM

Note:     For earlier trucks please call.
              Kit described here with optional GTX series turbos.

UPC Company Prefix: 81050502

UPC Code - 14: 00810505025077

UPC Code - 12: 810505025077

Installed 2009 LMM

Installed 2006 LBZ

Big Race Kit (custom)

LBZ 2006

Parts can be sold separately (call for details).

* SHIPPING NOTE- All shipping is done thru UPS and requires a signature.


This notice pertains to engine and vehicles which are off the public highways except where specifically noted otherwise. Federal law restricts the removal of any part of a federally required emission control system on motor vehicles. Further, many states have enacted laws which prohibit tampering with or modifying any required emission or noise control system. Vehicles which are not operated on public highways are generally exempt from most regulations, as are some special interest and pre-emission vehicles. The reader is strongly urged to check all applicable local and state laws.

Many of the parts described or listed on this website are merchandise for off-highway application only, and are tagged with the “Special Parts Notice” reproduced here:


This part has been specifically designed for Off-Highway application only. Since the installation of this part may either impair your vehicle’s emission control performance or be uncertified under current Motor Vehicle Safety Standards, it should not be installed in a vehicle used on any street or highway. Additionally, any such application could adversely affect the warranty coverage of such an on-street or highway vehicle.

Delivery times vary due to credit card processing and UPS pick-up schedules: holidays and drop-offs. (This is not subject to the control of PPE.)

PPE continues to lead the way with 50 states legal environmentally friendly fuel efficient products.