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Hi I have 2008 sti hatch with loads of mods including a full decat and MD321t turbo running 466bhp. I want to change the headers to an equal length 4:2:1 setup, will I need a remap?
Hi I have 2008 sti hatch with loads of mods including a full decat and MD321t turbo running 466bhp. I want to change the headers to an equal length 4:2:1 setup, will I need a remap?
change headers for equal length is remap needed
