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Intake manifold rebuild

Head scratching moments on the dyno... Everything absolutely perfect in the logs. Won't rev past 5200rpm under full load with stage 2 ... Perfectly fine with the stock map... Further investigation and reaching out from IE, we have found out this is an early revision pipe which at lower power levels is perfectly fine, but on high torque setups is known to collapse. IE have a new revision pipe to offer to stop this happening on the higher torque setups. They have contacted the customer directly an