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well i have cometic head gaskets but the block is fine but im sure the got a wake up call. the only thing that flew off was a silicon cup cus of the pressure! but it was a shock that it spiked to 21..... the controller is off the car now and back to my normal 10lbs but doyou think i should just ad the shims in the wastegate for 12lbs? haha it was fun though for that good 2 seconds!!!