Brian Crower Dual Spring & Steel Retainer Kit w/Seats Honda Civic Si 2006-2011 | BC0040S vendor_Moroso Improved ring seal increases combustion

Improved ring seal increases combustion efficiency and helps retain peak horsepower over time

Handcrafted using high-quality 3K 2x2 twill weave carbon fiber

Hawk HPS (High Performance Street) pads offer a tremendous improvement in braking distance over the GTR's OEM pads

The low amperage draw minimizes pump temperatures

offering smooth engagement

Brian Crower Dual Spring & Steel Retainer Kit w/Seats Honda Civic Si 2006-2011 | BC0040S vendor_Moroso Improved ring seal increases combustionThe Brian Crower BC0040S Dual Valve Spring & Steel Retainer Kit is designed for high performance Honda and Acura engine builds requiring increased valvetrain stability, improved valve control, and long term reliability under high RPM conditions. Utilizing BC1040 dual valve springs paired with durable steel retainers, this kit is ideal for street driven turbo, supercharged, and naturally aspirated applications. Unlike titanium retainer kits designed