depends on what stage you will go with, for example if you will go with the gtm sc stage 1.5 or stage 2, than you cant got LTH as there will be fitment issues with the LTH and SC, so you will have to go with the regular oem headers, as for HFC i will advise you to go with motordyne art pipes or test pipes when going FI as HFC wont be able to handle FI and will need to be changed after a while, even if you go with stage 1 sc its still best to use the regular oem headers as oppose to the LTH, although the LTH will fit the stage 1 sc, but its best to stick with the oem ones
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