Skip to content
Product estimated ship date of 6 weeks. Order cannot be cancelled for any reason.
NOTE: Pictures of Diffuser on GOLF R are not yet available. We will have updated photos around 9/17/2021. Same design with a slimmer main plane to accommodate dual tips and a slightly different leading edge on forward flat floor to account for Haldex/Exhaust routing.
Often Imitated, Never Duplicated.
Let us preface by boldly stating this is NOT a universal product, but rather handcrafted to fit the Volkswagen MK7/MK7.5 Golf R accurately and specifically. Isn’t that such a refreshing statement? Gone are the days of “universal” parts that yield lackluster results. This product DOES NOT fit the standard Golf TSI or TDI.
WHATS INCLUDED?
- Installation Guide
- 5052 Aluminum Multi-piece Rear Diffuser (main plane, left & right planes, forward flat floor)
- 5052 Aluminum Rear Brackets
- 5052 Aluminum Mid Brackets
- 5052 Aluminum Forward Brackets
- 6 High-Impact/Heat-Resistant Replaceable Strakes
- Stainless Steel Metric Hardware with 4 height adjustment combinations to work with most aftermarket exhausts
- Loctite Threadlock
GOOD TO KNOWS!
- Fits Years 2015-2021 (Golf R)
- CFD validated
- Increase MPG's
- Decrease Lift and Drag
- Direct Bolt-on with no modification necessary
- Pre-installed nuts on necessary brackets for painless installation
- CNC Precision machined planes
- CNC Precision machined strakes
- CNC precision machined brackets
- CNC precision press brake bent planes and brackets
- Durable and replaceable strake design
- Beautiful and Durable Powder Coat finish
We Are Innovators
aerofabb® is proud to offer a fully functional Rear Diffuser for the MK7/MK7.5 Golf R with an innovative, durable, and replaceable strake design.
Rear Diffuser Construction
The aerofabb® Competition Series Rear Diffuser main plane, side planes, and forward flat floor are constructed from a light weight, precision machined 5052 Aluminum which is finished in lightly textured and durable matte black powder coat.
No need to worry about bending or cracking Diffuser Strakes. Our easily replaceable/durable strake design is made from a high-impact/heat-resistant plastic. We look at this component as a “wear” item. This innovative design allows for load to be placed on the strakes if and when there is contact with the roads surface, without sacrificing durability. No need to replace an entire unit if it comes to the point of excessive “wear”.
5052 Aluminum was the choice for our CNC machined/press brake bent brackets with four of them featuring pre-installed nuts for painless installation.
Stainless Steel Metric hardware is used throughout the kit to securely mount and fasten all components together.
Adjustability
Depending on your current exhaust set up, aerofabb® gives you height adjustability in order to accommodate most aftermarket exhausts.
Confirmed Golf R Exhaust Fitment
OEM
Real World Testing
A visual tuft test was used during the beginning stages of development in order to confirm our base design worked and air was evacuating as it should. We then made minor but necessary changes to strake size, length, and angle (especially side planes near the rear wheels) to prevent spill over into the main plane.
CFD Optimized Aerodynamics
Using ANSYS Fluent Software for CFD (Computational Fluid Dynamics) we were able to optimize our design and further validate its functionality. As we are still developing more Competition Series aero (including flat floor panels) we opted to use an Ahmed model to showcase effectiveness until we simulate the entire vehicle with all components once complete.
Ultimately, lift and drag were greatly reduced from the Ahmed base simulations. Other inhibiting factors are taken into account on a real vehicles underbody vs an Ahmed Model however, this is where our additional Competition Series aero comes into play as a balanced packaged to increase their overall effectiveness.
(More data with vehicle modeled will be released once our Competition Series Front Splitter is complete)
VELOCITY STREAMLINE WITHOUT REAR DIFFUSER
HPA branded products carry a one year warranty against manufacturer's defects on all major, non-consumable, components. Damaged caused by incorrect installation, wear and tear, abuse, misuse, racing, collision, foreign particles, etc., will NOT be covered by warranty.
Warranty is offered to original purchaser only and is not transferable.
HPA Motorsports will not be liable for incidental, consequential, indirect, special, or punitive damages of any kind. HPA’s entire liability shall be limited to replacement or repair of the damaged parts at HPA’s option.
Labour and freight costs associated with warranty repair or replacement are NOT covered.
To maintain validity of warranty, factory recommended maintenance schedule and manufacturer’s Technical Service Bulletins (TSB’s) must be adhered to and documented.
In addition to the above, the HPA FT/FTX series Turbo packages for VR6 motors have the following conditions:
Components covered by warranty include:
- Turbochargers
- Exhaust Manifold
- Downpipe
- Catalysts
- Exhaust System
- Intake Manifold
- Silicone Plumbing
- Intercoolers
- Fuel Pump
- Fuel Injectors
- Brake Calipers
- Haldex Controller
Components NOT covered by warranty include:
- Clutch
- Gearbox
- Brake Pads & Brake Rotors
Any claims of defect in workmanship must be repaired at HPA Motorsports' facility located in Langley, Canada. Should the damage be determined to be a direct result of the workmanship of HPA Motorsports, labor costs for HPA Motorsports to complete repairs at our own facility will be included in the warranty repair. In certain circumstances, at the sole discretion of HPA Motorsports, permission may be granted for repairs to be completed at an HPA authorized facility at a pre-approved labor rate.
HPA Motorsports will not be liable for incidental, consequential, indirect, special, or punitive damages of any kind. HPA’s entire liability shall be limited to replacement or repair of the damaged parts at HPA’s option.
To maintain validity of warranty, in addition to the factory recommended maintenance schedule, the following services must be adhered to and documented according to the prescribed schedule:
| Break In period: engine speed is not to exceed 5500 RPM, and absolutely NO standing starts are to be performed | 1000 km / 620 miles |
| Mass Air Flow meter – Clean | 5000 km / 3100 miles |
| Mass Air Flow meter – Replace | 20,000 km / 12,500 miles |
| Engine Oil (Motul Xcess / 8100 5w40) & Filter – Replace | 5000 km / 3100 miles |
| Haldex Fluid & Filter – Replace | 10,000 km / 6000 miles |
Any claims of defect in workmanship must be repaired at HPA Motorsports' facility located in Langley, BC Canada. Should the damage be determined to be a direct result of the workmanship of HPA Motorsports, labor costs for HPA Motorsports to complete repairs at our own facility will be included in the warranty repair.
For remote customers, in certain circumstances, at the sole discretion of HPA Motorsports, permission may be granted for repairs to be completed at an HPA authorized facility at a pre-approved labor rate.
Should you experience any issues with your items, please contact HPA Motorsports for technical assistance using the form below or by calling 604-888-7274 prior to engaging in any repair procedure. Failure to follow the advice of our technical support staff may cause undue harm that will not be covered by warranty.