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VW 337/20th Performance Diverter & Blow Off Valves -

Ready to blow off a little steam?

Stock diverter valves just can't handle performance upgrades. Add a little boost and they get all weak in the knees and go to pieces.

It's for this reason that ECS now supplies an unparalleled range of superb Performance Diverter & Blow Off Valves. All of the most prominent brands are represented - Forge, HKS, ECS, EuroSport, Vaico, Kayser, and APR kits all feature boost-hardy internals tough enough to take the pressure without blowing their lids.

Each unit works and plays well with your 337/20th Jetta engine management system.