All IRS Type 3s used the double spring plates, while Beetles went to singles in 71. I guess they thought the extra weight of a T3 warranted it. They were wrong. This has been proven by looking at a stock 944 that has single spring plates.
Instead of using Beetle spring plates, use stock 944 adjustable spring plates. Then you can use the camber adjustment Porsche designed. I adapted the 944 spring plates into my Beetle without the camber adjustment.
Single spring plates weigh less.
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