Brian Crower Dual Spring & Steel Retainer Kit w/o Seats Honda Civic Si 2006-2011 | BC0040SX Vehicle Model_TC A smaller battery for clearance

A smaller battery for clearance (B19L is suggested)

Engine modifications e

Grand Wagoneer

Infiniti G37X Coilover Specs:

Part #: 15017-HDTZ

Brian Crower Dual Spring & Steel Retainer Kit w/o Seats Honda Civic Si 2006-2011 | BC0040SX Vehicle Model_TC A smaller battery for clearanceThe Brian Crower BC0040SX Dual Valve Spring & Steel Retainer Kit is engineered for high performance Honda and Acura engine builds that demand improved valvetrain stability at elevated RPM levels. Designed for K series and F series engines, this kit combines BC1040 dual valve springs with durable steel retainers to provide reliable valve control for aggressive camshafts, forced induction setups, and high revving applications. Unlike lightweight