I thought they relaxed the rules recently to allow these kinds of things including bigger STi turbo etc, could be wrong though.

Dougie should be up to speed with all the latest and greatest regs so ask him.

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221.7KW-ATW 498.5NM MMS ROLLER DYNO & BUILT BY STi NINJAS, BUILD #318/600

EBISU SUBARU, SHIBUYA-KU TOKYO