Application.
Datsun 1200 (7001 - 7305)
Datsun 1200 ute (7510 - 9403)
Datsun 1000 (6604 - 7001)
Datsun 120Y, B210-B310 (7305 - 7710 - 8304)
Datsun E10 (7010 - 7409)
Available for Aseries engine.

Include.
x8 Outer springs.(Bprojects JAPAN: 13203-H2300)
x8 Inner springs.(Nismo Genuine: 13204-M0820)
x8 0.5mm shims.
*1pr Dual Valve Springs, (x8 Inner and x8 Outer with 0.5mm shims/set for one engine.).

This item is worthy of middle class specifications enough.(To about 8,000-9,000 rpm spec)
Nismo supply special parts.
The double valve springs control Valve Surging at the time of high rpms.
It supports; cam lift - 6.5-7.25mm, valve lift - 10.5mm.
*Lower the red paint points.
*Change the spring seats and spring retainers together for double valve springs.
*Please require insert the 0.5mm shims to the spring sheet bottom.

Nismo Recommendation : please use together genuine valve parts below,
1. Spring seats: 13205-H2300(P-E-0112)
2. Spring retainers: 13209-H2302(P-E-0113)

Various elements(Nismo inner springs),
Coil diameter: 2.8mm.
Coil OD: 21mm.
Free Length: 41.2mm.
Set Lenght: 34mm.
Lift Lenght: 24mm.
Set Load: 12.5Kgf(123N)
Lift Load: 29.9Kgf.(294N)
Supported Valve Lift: 10.5mm(If Cam Lift: 6.5-7.25mm)
Converter mm-inch