Brian Crower Mazda MZR Single Spring/Steel Retainer Kit BC0400S

Designed for high rpm, BC valve springs by PAC Racing are wound from only the highest grade, super clean, chrome silicone alloy and feature proprietary processing procedures for consistent pressures.

Type	BC1400 Single
Free Length	1.788"
Seat	1.400" @ 86 lbs
Open	1.000" @ 190 lbs
Coil Bind	0.835"
Retainer	BC2400S
Spring Seat	OEM
Net Cam Lift	0.480" / 12.19mm