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Performance Diverter Valves
Flat 6 Motorsports by EVOMS billet diverter valves for the Porsche 991 and 991.2 Turbo/Turbo S, a direct replacement for the OEM plastic valves that are known to leak boost on both stock and tuned cars. Machined from billet aluminum with a stiffer spring than stock, they hold more boost pressure and recover faster after each shift for better spool, while a 90-degree vacuum port gives extra clearance for a straightforward install. They also eliminate the "honking" noise that OEM valves make once they've failed. Flat 6 Motorsports has tested the valves on cars making over 1,000 horsepower, though they work equally well as cheap insurance on an otherwise stock car. Sold as a pair in black only, with a lifetime warranty.
Frequently asked
Which cars does the Performance Diverter Valves fit?
Fits your Porsche 991 Turbo S. Fabspeed lists this piece for: all Porsche 991 and 991.2 Turbo / Turbo S. Exact fitment for your year, trim and options is confirmed on your free consult before anything is ordered.
What does the price include?
The delivered price includes the part from Fabspeed USA, freight to Australia, import costs and GST. Enter your postcode to refine delivery; the final figure is confirmed on consult.
How long until it arrives?
Every Fabspeed part is made in-house at Fabspeed USA with about a one-week production lead time, then allow another 3-4 days for delivery to Australia via UPS. That freight is already included in the price.
What's wrong with the factory diverter valves?
The OEM units are plastic and prone to leaking boost over time, which shows up as the notorious "honking" sound and a loss of power.
Do I need these if my car is still stock?
Fabspeed markets them as cheap insurance across the full range from stock to over 1,000 horsepower, since the OEM valves can fail regardless of power level.
What finish do they come in?
Black only, machined from billet aluminum, with a lifetime warranty.
Who installs it?
Rennen Motorsport in Adelaide, or an authorised dealer near you. Fitting it yourself may also be an option depending on the part, so raise it on your consult; professional installation is quoted separately.
Is it covered by warranty?
Fabspeed products carry the manufacturer's warranty, supported locally through Rennen Plus as the Australian principal. See our returns policy.
Can I just buy this outright, or do I need to talk to someone first?
Every enquiry, whether it's one part or a full build, starts with a free consult. We confirm the exact spec for your car before anything is quoted or ordered.
