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7163 owner here. P12 head with N1 cams. 404whp/338ftlbs at only 20psi and 6500rpm on a Mustang Dyno. Was blowing out spark anywhere above that. Have since put in IGN-1A coils and going back for 25-30psi/8-9k. Should pull 500whp/400ftlbs no prob and spools great with the mixed flow TiAl wheel.
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