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What parts are you talking about? I think there is a difference between the downpipes on the blob and hawk eye.
Iv agreed to buy Rob2006's Hayward & Scott 3" twin scroll system off his JDM blobeye. Its got a decat downpipe & resonated centre section with Jap style straight shape backbox. Im hoping it will be under 105db for trackdays, though I already have a 4.5" bung.