Valve Springs

Make	Model	Pressure	Comment
Supertech	Single SPRK-MM18-S	56	Sustained revs to 7400rpm, mechanical over rev to 7800. N/A only (supermiata)
	Light Double SPRK-1012-M18D	63	Sustained revs to 7800rpm, mechanical over rev to 8200. < 8psi boost (supermiata)
	Heavy Double SPRK-MM18-D	74	Sustained revs to 8500pm, mechanical over rev to 9000. > 8psi boost (supermiata) VVT is possible with heavy doubles, but is right on the edge of the phasor capabilities. […] All-in-all not worth it. (Ted75zcar)
Catcams	PAC-S90015