I'm in the process of upgrading my front suspension. I have a Spohn steering brace (wonderbar) ready to go in. Is there any benefit to adding a strut tower brace in addition to the wonderbar?

 

for straight line racing? no.

for turning, yes. the wonderbar braces the front "framerail" extentions.. this keeps this lower "frame" area from bending as the car is turning.

the strut tower brace connects the top of the two strut towers, and tries to keep them from shifting around as the car turns. the struts are mounted on a sheetmetal curve that o has the lower part attached to the frame rails, and the upper part on a "arm" that sticks out under the fender... the wonderbar offers no real bracing for this fenderwell area.