SR ULTRA DOWNFORCE DRY CARBON FIBER REAR DIFFUSER [PORSCHE 718 GT4 RS]
Highlights:
- GT3R Grade Race Diffuser: The SR Ultra Diffuser is a genuine motorsport design that generates similar rear axle downforce as the Porsche GT3R race car.
- Individually Replaceable Blades: Each Diffuser Blade can be replaced at a very reasonable price to maintain a low on-Track Running cost. Worry free to fully push your GT4RS at limit.
- SilverRocket BlitzSwap Diffuser Blade System: Designed for ultra-fast, effortless blade changes. only 25 seconds to replace a single blade.
- Motorsport Material & Construction: Crafted from aerospace-grade dry carbon fiber, plus each blade incorporates a proprietary hollow-core structure to maximize the weight-to-strength ratio.
- Heat Resistant Coating: The inner surface of the diffuser floor features SilverRocket's proprietary R-HR Heat-Resistant Coating, ensuring superior longevity under demanding high-temperature conditions.
- Compatible with most aftermarket flat bottom exhaust: Please check compatibility guide doc here.
Application:
- Porsche 718 GT4 RS
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GT3-R Race car grade diffuser
The SR Ultra Downforce Diffuser is a true motorsport-grade rear diffuser engineered to deliver rear-axle downforce on par with Porsche GT3R race car - while producing the maximum possible downforce(~105KG Downforce at 200KM/H in CFD simulation) from the underbody floor at the lowest achievable drag.
Pure race-bred performance. Exceptional efficiency. Uncompromising grip.
FloorSafe blade with hollow-core structure
The FloorSafe Blade, designed to ensure gentle interaction with the diffuser floor during accidental contact, prevents damage and preserves floor integrity.
The Ultra-lightweight Hollow-Core construction is precisely engineered to achieve the ideal balance of controlled flexibility and durability.
SilverRocket blitz-swap diffuser blade system
Designed for ultra-fast, effortless blade changes. Swap between Street and Race versions or remove all blades instantly for safe transport.
Result: Replace a single blade in just 25 seconds.
Track tested & verified
As with all SR products, the SR Ultra Downforce Diffuser has been fully track-tested and rigorously verified under real-world circuit conditions prior to being released to customers.
Aero Performance: During our track testing, we successfully maintained equivalent rear axle downforce while reducing the DRS-1 rear wing angle of attack (AoA) from 7° to 5°
Blade Durability: After ~80 laps with aggressively cutting high curbs, no blades were damaged, only minor surface scratches were noted.
Street version shorter blades available
To ensure the SR Ultra Downforce Diffuser is fully suitable for daily driving, we have developed a dedicated street version featuring shorter blades. These street blades incorporate the advanced SR BlitzSwap Blade System, enabling effortless and rapid interchangeability between the race and street blade sets.
This dual-configuration approach allows owners to optimize aerodynamic performance for track use while maintaining practicality, ground clearance, and compliance for everyday road conditions.
Compatible with most aftermarket flat bottom racepipe system
To achieve superior performance compared to the original factory diffuser, a superior diffuser must incorporate significantly larger diffusion volume. However, the two large mufflers of the factory exhaust system completely obstruct any possibility of achieving greater diffusion volume. For this reason, the SR ULTRA Downforce Diffuser was specifically developed and designed exclusively for vehicles whose original factory exhausts has been replaced with an aftermarket system that removes the two large mufflers.
All development and testing of the SR Ultra Downforce Diffuser were conducted using the SR 3200G one-piece titanium Racepipe. Therefore, the SR 3200G Racepipe is 100% compatible with the SR Ultra Downforce Diffuser.
That said, the SR Ultra Downforce Diffuser may also be compatible with other aftermarket exhaust systems that have eliminated the original mufflers. To assist customers in determining compatibility, we have prepared a dedicated measurement guide/manual (Download Here) , enabling owners to verify whether their specific aftermarket exhaust system is compatible with the SR Ultra Downforce Diffuser.
