Free domestic shipping on all Performance Valve Springs and Ross Harmonic Balancers
Performance Valve Springs & Ti-Retainers for Nissan / Holden RB30 (SOHC) engines
Dual springs with up to .550″ valve lift.
These install with 120Lbs seat tension at 1.640 and have 250Lbs at 1.245, coil bind is 1.000
