Brian Crower Dual Spring & Titanium Retainer Kit w/Seats Honda Civic Si 2006-2011 | BC0040 vendor_AutoMeter Constructed using high-quality materials and

Constructed using high-quality materials and designed as a direct replacement for the factory thermostat

Stable idle characteristics for large injectors

22mm in sizing (7/8 inch)

Improved heat management compared to stock pads

road racing

Brian Crower Dual Spring & Titanium Retainer Kit w/Seats Honda Civic Si 2006-2011 | BC0040 vendor_AutoMeter Constructed using high-quality materials andThe Brian Crower BC0040 Dual Valve Spring, Titanium Retainer & Seat Kit is engineered for high performance Honda and Acura engine builds that require superior valvetrain stability at elevated RPM levels. Designed specifically for K series and F series applications, this kit combines BCs proven dual valve springs, lightweight titanium retainers, and hardened spring seats to support aggressive camshafts, forced induction, and high revving naturally