Ferrea Audi 3B/AAN/VW PL/9A 28.6mm 6.93mm 22 Deg Flo Rad Grv +0.5mm 6000 Series Exh Valve - Set of 8

If you're rebuilding the top end of your Audi 3B, AAN, or VW PL/9A engine, you'll want to make sure your exhaust valves can handle the heat and pressure. These Ferrea 6000 Series exhaust valves are built for that job. They're designed to keep your engine running smoothly and reliably, even under demanding conditions.

Ferrea uses a high-strength, heat-resistant alloy for these valves, which is crucial for exhaust applications where temperatures can get very high. The 28.6mm head size and 6.93mm stem diameter are specific to these Audi and VW engines, and this set is a +0.5mm oversize, meaning they're slightly larger than stock to help seal worn valve seats. The 'Flo Rad Grv' design refers to a specific groove shape that helps with valve seating and flow dynamics. This set includes eight valves, enough for a full cylinder head.

When installing these, remember they are an oversize part. You'll need to ensure your valve guides and seats are properly machined to accept the +0.5mm size for a perfect seal and optimal performance. It's a good idea to have your cylinder head professionally serviced to ensure these valves perform as intended.