Blow valve
Please do a little research on here. This question has no one answer. You must decide and chose for yourself which piece works best. Some will say tial perrin greddy synapse etc..
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totally personal opinion like its been said. But Tial does make a great BOV, I use a Greddy BOV. There are tons out there that are great and will work for whatever purpose u need! Just do some research first!!! Good luck










<Tial> if no MAF