Explorer Gt40 Heads Vs Cobra Gt40 Heads - Valve Springs?

[Exile]

Explorer GT40 heads vs Cobra GT40 heads

Im sure this has been discussed before, but I have searched, and havnt been able to find the answer...

I know the Cobra GT40 heads came with upgraded Crane 1.7 roller rockers, but did the Cobra GT40 heads come with upgraded valve springs? If so what is the max valve lift on them?

Or are the valve springs in the Cobra GT40 heads the same valve springs used in the Explorer GT40 heads?

 

[mikestang63]

IMO both are not great if you are planning on a decent cam or power adder, but the explorer springs are weaker than the Cobra. Early 93 Cobra's had issues with the exhaust valve springs failing. I wouldn't run either on my car.