Fastrax203

Ok so I got these M030 Height adjustable Koni struts from another member here and I'm trying to decide what springs I should use. What length should I order from HyperCoil? Rate? Should I get a helper spring? The car will be mostly used on the street with occasional track sessions.

400hp944

I recently swapped my Mo30 to 2-1/2" springs and adjustable camber plates. I went with Ground Control. They had to machine the bottom perch to accept the 2-1/2" springs and the camber plates came with the hats. Make sure the perch will accept the springs. I would suggest you give them a call. They are very helpful.

Do a search about the spring rates. Opinions are all over the place....

951Saga

This is what I chose, Coil-Over Kit - front, with helpers and the 200lb option to be close to my unchanged rear components… very happy!

2bridges

would not even waste you time anything under 350lb front.
Will be firm but definately streetable anywhere, especially with adjustment to soft on street.
Also have to adress the rear with helper spring or 29/30 tbars

I recall I went 10" spring but had it adjusted to the absolute bottom to get propper ride height (fairly low)
You could got to stock height on a 10". I recall thinkng 8" would have worked even better for me.