DO88 Bigpack Porsche 911 Turbo (991.1) 2015+ ONLY - High Flow Cooling Kit (Optional Inlets)

To fit:
Porsche 991 Turbo and Turbo S 2015+

A true performance cooling upgrade for the 991 Turbo / Turbo S

This is the most refined of all products we carry today!

• Significantly improved Air flow! (see graph images).
• Cooler air to your engine!
• High quality high density UK made motorsport cores.
• 3D freeform designed cast end tanks
• Custom designed carbon fiber ambient air guides.
• Comes with high quality silicone hoses and accessories for installation.

About the intercoolers: Right from the beginning we realised that we could not sacrifice anything to keep the cost down we just had to do the best possible in the space available in the car!

First of all we made a lot of investigation and comparisons between different core types and at last really fell for a high density motorsport core which have great cooling efficiency along with a low weight.

With a great core in place we started to refine the end tank design which brought us to a decision to make cast end tanks as we could then control the air flow distribution over the core in a very precise way. This is very important as a good tank design will be beneficial for both pressure drop and cooling efficiency.

To be able to fit an intercooler with appropriate thickness for the job it was also necessary to design a new upper ambient air guide. This was designed in our 3D scanned environment to ensure perfect fit to the vehicle integrated air guides and our intercooler.

To achieve the best air flow distribution over the core we made intercooler end tanks with 70 mm (2 3/4 inch) connections which then made it necessary to design custom silicone hoses for all positions. The hoses are 3D designed with airflow in mind where we CFD tested each hose during development to ensure best possible flow rate of all parts! The hoses between turbocharger and intercooler are special silicone hoses that can withstand up to 240°C (464°F) continuous temperature!

Another important aspect for cooling performance are to use all ambient cooling air available, to optimize this part we include air block rubber seals for all surfaces where the ambient air guides must seal properly.

Using this design in building our intercoolers the weight increase compared to the OEM ones is relatively small considering the size of our intercooler and that its all made of aluminium. Our intercooler weight is 5,4 kg (11,9 lb) per piece and the 991 OEM intercooler weights 3,1 kg (6,8 lb) per piece. It might sound like a big weight increase but compared to other actors on the market with intercoolers in this size it's a low weight!

At the same time as our intercoolers lower the intake temperature, they also flow better than the 991 original intercoolers! Please have a look at the air flow rates at different pressure drops in the graph below where we compared our intercooler with hoses to the original intercooler with hoses in our own Superflow SF-1020 Probench to verify the final result!

Keep in mind that the OEM intercoolers was designed for only the power level the car was built for originally. A power increase may cause your stock intercoolers to not be efficient enough. So even on an engine with a software tune only or using your car in hot climate the do88 performance intercooler kit will give a performance increase over the OEM intercoolers!

This do88 performance intercooler kit comes as a complete package with all parts necessary for installation.



About the Y Pipe

Our pipe has both a very good flow rate and a low weight which is accommodated by composing mandrel bent lightweight pipes with a high quality 3D freeform designed cast joint between them. Onto the cast part we then weld CNC-machined connections for bov and breather hoses. This construction technique adds a lot of performance but only a touch of extra weight. The pipes are then finished in a high quality powder coat that makes them look as good as they perform!

When it comes to air flow performance our Y-pipe totally outperforms the OEM Y-pipe by 58% increased flow at the same pressure drop! Be aware of that the OEM parts are only designed for the power level the car was built for originally. A power increase may cause your stock Y pipe to hold back the power of your engine. So even on an engine with a software tune only the do88 performance Y-pipe will give a performance increase over the OEM Y-pipe!

Much larger inner diameter for improved air flow, 58 % higher! (see graph images).
Made of 2,5" (63mm) mandrel bent aluminium pipes.
The pipe has two methanol injection connections (1/8 -27 NPT). The pipe is delivered with blanking plugs in these connections.
Smooth flow cast collector part.
Smooth internal surface for best air flow.
Comes with high quality silicone hoses and accessories for installation.

About the Inlet Hoses

do88 proudly presents the worlds first high flowing turbo inlet hoses for Porsche 991.1 / 991.2 Turbo. Self developed by do88 in Sweden !

• Much larger overall inner diameter for improved air flow, 31 % higher! (see graph diagram ). The hoses have a 2,5 inch (63mm) inner diameter at the narrowest location.
• Smooth flow transitions.
• Very smooth internal surface for best air flow.
• Excellent thermal properties, the hoses will not absorb heat from the engine.
• The hoses are reinforced with stainless steel wire to eliminate the risk of implosion on high out-takes.

It was a real challenge developing new turbo intake hoses for the 991 Turbo. The lack of space made it really difficult to make a set of hoses that would outflow the stock plastic pipes. We succeeded but in some smaller areas we had to compromise and allow these hoses to have no clearance, so they will push or rub in some non-sensitive areas.

We can ensure you the sensation while driving is very different. The improvement in throttle response is immense, making the car feel so much more refined and alert. This upgrade makes it become what it should have been from the start. This is an improvement no test figures can explain, it has to be perceived behind the wheel of a 991 turbo!

The inlet hose package includes everything for mounting:

• 2 wire-reinforced silicone hoses
• 2 silicone hoses
• 2 breather valves
• 2 CNC machined VTG adapters
• Clamps and Screws


Equivalent Porsche OEM part numbers 99111063972, 99111063973, 99111064072, 99111064073, 99111005070, 99111064672, 99711064773KLO (for cross reference only)

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

BIG-200-GEN1-179

The product you are viewing cross references to these numbers