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503E

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If it's not really about tuning or wiring. Then it belongs in here.

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I was sent this the other day and was fascinated by (yes I'm ill-informed) an engine I had never heard of 503E.

What a great story. The 2JZ was either too heavy or underdeveloped enough to compete in a Supra.

https://www.youtube.com/watch?v=gll-cNaPRi4

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