The Bisi header is really the only one worth getting for the performance increase. If you can get by with one that's not CARB legal, then the Megan one will be fine. If you need the CARB number, DC is good stuff. Their build quality is great, but the design doesn't offer much over the Megan design.
They really DO perform a bit better than the A4 header, but not so much that it really justifies the upgrade for a considerable amount of money.
They really DO perform a bit better than the A4 header, but not so much that it really justifies the upgrade for a considerable amount of money.
