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Manley Pro Flo 25 mm exhaust valves for 1988–1991 Honda Civic/CRX Si are race-series valves engineered for high-RPM applications up to 8,000 RPM. Constructed from stainless steel with swirl-polished under-head areas and fully machined combustion faces, they include chrome stems and hard tips for wear resistance. Recommended for alcohol engines and available in race-oriented shapes, these valves are built for durability and consistent flow in demanding use.
Manley 88-91 Honda Civic CRX SI 1.6L SOHC 16 Valve (DA16A6) 25mm Pro Flo Exhaust Valves (Set of 8)
