993 - 996 - 997 Turbo GT2 recirculation valves Pop Off valves for Porsche 911

Product description: Race air recirculation valves (pair)

Suitable for:

• Porsche 993 Turbo

• Porsche 996 Turbo

• Porsche 997 Turbo

Description & Benefits:

One of the most important upgrades for Porsche turbo engines is replacing the original Bosch recirculation valves .
These tend to increase at increased boost pressure, especially in vehicles with optimized ECU (chip tuning).
Pressure losses , which can lead to loss of performance.

Even at stock boost pressure, the diaphragm design of the OEM valves can reduce boost pressure.
The AMS Racing recirculation valves, on the other hand, ensure that the boost pressure is kept constant up to the maximum value
which significantly improves the overall performance of the vehicle.

But also when opening too slowly during fast gas changes on the race track, it often happens
high torque peaks which can subsequently cause severe damage to the transmission.

Technical features:

• Material: CNC-machined 6061 aluminum

• Internals: Piston with O-ring seal – guaranteed airtight & easy to maintain

• Spring: Specially designed for moderate to aggressive boost pressure increases on 996TT and Cayenne

• Service-friendly: Screw-on top for easy maintenance and lubrication

Advantages at a glance:

• No pressure loss during tuning or standard performance

• Higher and constant boost pressure

• Suitable for standard or upgrade hose systems

• Tested up to 700 hp (e.g. with K16 or K24 turbochargers)

• Durable, maintainable construction

Reference/part numbers (for comparison):

• 3603500005

• 99311033750

• 99311033751

These reference numbers serve as comparison or replacement numbers
to original parts and help identify compatibility.