Just do it yourself with a dremel...You'll go through a ton of bits and take alot of time, but it's far cheaper than extrude honing
Stock manifold will support over 500rwhp anyways...
Ebay ones are t4 flange, too much trouble since you already got a bolt-on turbo
Quote:
Originally posted by 89TSoup
hey does anyone know a local place to get my exhaust manifold ported?
Tim at SP suggested i do this to help with flow for my sp61gt.
What about those ebay ones, aren't those only available in a t4 flange.
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