Volvo BIG Turbo Kits

Moose Muscle Packages 

If you’re reading this then we already know a couple things about you.

1.) You like to modify your Volvo

2.) Putting the gap on your friend’s STI, M3, Evo… etc is something you’ve always wanted to do

 Well look no further because we have your back!

With our new Moose Muscle Package we can guarantee your competition will be full of regret.

Our packages will be available for Volvo

T6 3.0L / T6 2.0L \ P2R

If you are interested in a Moose Muscle Package and you do not have one of the platforms listed, please send us an email to discuss possible custom build options.


Volvo 3.0L T6 (B6304T4/B6304T5)

Moose Muscle Package Price (estimate): $6,499.99

EFR Turbo 7670

Tubular Exhaust Manifold

Steel Braided Oil and Water Lines

Intercooler Charge Pipes 

Down Pipe

Air Intake



Instruction Manual

*Heat resistant ceramic coating is available in 8 different colors upon request

Power expectations: 

  • If you want to use the kit on your Volvo 3.0L T6 without upgrading the engine itself, then you would have run a lower boost pressure (13-17 psi) and your power expectations should be between 380-425 bhp.
  • With forged connecting rods and upgraded cam installed, you can expect to make 450-520 bhp. (@ 18-24 psi)

*Our goal is to make Volvo performance as affordable as possible, this pricing is an estimate and may change depending on whether we add standard items to the kit as R&D continues. Forged connecting rods and pistons will be available to those wanting to take their Polestar to the extreme. Cost for the forged connecting rods is $1,600.00 and the cost of the forged pistons for the Volvo 3.0L T6 is $1,350.00. The forged connecting rods are the only engine internals that MUST be upgraded in order to achieve 400whp+ on the dyno with the Volvo 3.0L T6. The factory pistons in the Volvo 3.0L T6 are considerably strong compared to what we have seen previously from Volvo in the past and are capable of 500bhp – 550bhp stock. You won’t have to upgrade the factory pistons in the 3.0L T6 until you hit 550bhp+ (Boost: 25psi+)

  • KT4 Performance recommends upgrading the factory fuel injectors to at least 755cc for stock block applications (but is not required) and 850cc for built block applications (required).

As far as the transmission is concerned, we are currently working on developing this upgrade as well. By increasing the surface area of the clutch within the factory transmission, improving the flow of the factory valve body to increase the overall line pressure and upgrading the factory transmission cooler, we can increase the overall torque output by up to 50%, which is roughly 600 lbs\ft. If you plan to use your factory transmission with the big turbo kit, that is completely okay, but you must be careful to avoid hard launches as this may cause the transmission to leak and slip as the single clutch struggles to grip with the massive amounts of torque from your new high performance set up. Shifts between gears once the car is rolling are no issue for the Volvo, at WOT on the highway the TF-80SC is able to hold up between higher gear shifts. It only begins to have problems when it is being launched hard and often.

 Turbo Charger Information:

BorgWarner EFR 7670 Turbo (12769097001)

BW’s EFR 7670 is ideal for responsive street driven vehicles as well as road racing and time attack applications. EFR7670 delivers early spool with a healthy 64lb/min compressor flow.

BW utilizes their 70mm Gamma-Ti turbine wheel as the optimal match for the 57.2mm inducer / 76mm exducer FMW compressor for unmatched response. This turbo uses the mid-size EFR ported-shroud compressor housing, great for fitment in cramped engine bays. An excellent fit for use in single turbo applications for the 400-600hp range (up to 2.6L), or as twin turbo applications 800-1200+hp. Ceramic Ball Bearing only, watercooling recommended.

Compressor Specifications

  • Compressor Type: Forged-Milled Wheel (FMW) Extended Tip
  • Compressor Wheel OD (exducer): 76mm
  • Compressor Wheel Inducer: 57.2mm
  • Max Flow Rate: 64 lb/min
  • Built-in BOV: All EFR compressor housings incorporate an integrated BOV.
  • Compressor Housing Connections: [list] [*]Inlet: 3.5″ Hose Coupler
  • Outlet: 2.0″ Hose Coupler

Turbine Specifications

    • Turbine Type: Low Inertia Gamma-Ti Turbine Wheel
    • Turbine Wheel OD: 70mm
    • Stainless Steel Sand cast Housing

The EFR 7670 is available in the following turbine housing configurations from KT4:

  • 0.83 A/R T3 Single Scroll (Internal WG) – Part # 179351