Im going to go against the grain here and say that theyre not in the wrong here, You've provided no evidence at all that your setup is better than stock, and theyre just asking for hard numbers. Sure it is adjustable and has coil overs, but neither of those in and of themselves don't necessarily makes the car any better.
What are the changes to sprung and un sprung rate? Have you performed a burndorf analysis? What are the changes to ackerman( what is the factory ackerman and did you go more or less positive and why?). Have you plotted bump steer in a dynamics analyzer? Have you measured the actual bump steer since you have one complete now? Have you dyno tuned the shocks to the spring rate and package?
Show hard data, both in theory and in application that its better, how its better, and then you'll have belief in your product!
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James F.
1974 Camaro Z28
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