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This Cometic Viton valve stem seal is a positive ring-and-band style specified as 8 x 12.3 x 12 x 17 and is intended to control valve stem sealing in applicable engines. Cometic supports product reliability with in-house dyno and assembly testing; the Viton construction provides heat-resistant elastomer performance. The seal is supplied as an application-specific valve stem component for routine valve train service.
Cometic Positive Ring and Band 8 x 12.3 x 12 x 17 Viton
