I'm debating on where to get my ported supercharger from. WBS is cheaper but only does intlet and outlet work. ZZP does both plus EGR hole fill. I heard filling the EGR hole will make the supercharger whine a lot louder and that would be really nice. But for the price, I'm not so sure. How hard is it to fill the EGR hole and will WBS do that?
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03 GTP 13.80 @ 99.69mph
Custom tune, cat-back exhaust, FWI, Colder plugs, 3.4, Pacesetters, 180 tstat