If you have the Cobb, mate it and do a stage 1 Off The Shelf (OTS) tune from them. You don’t really need a dyno tune until you gut your cats, replace them with catless or high flow catted Down pipe. Your next potential parts to max out at that point are injectors and/or fuel pump. Also do t waste your money on a fancy blow off valve. The stock bypass valve is up to the task for any boost levels you would be safely running on the VF40. On these cars vent to atmosphere BOV’s lead to idle issues and tuning trouble.
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