I have got a 25mm manifold spacer, 12mm plenum spacer, Cold air intake kit and Recalibrated PCM/Memcal for my VS V6 from Mace,I was wondering if I would notice a difference with the 69mm throttle body at this stage? Michael July 24, 2023 09:27 Updated You genuinely would, however the calibration/tune would need to be updated to suit the larger throttle body. Related articles My mate has just given me a mace 12mm plenum spacer and 12mm manifold insulator for my VS V6 Commodore but has given them to me by themselves, I read that you need rail spacers or something as well? Comments 0 comments Please sign in to leave a comment.
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