"How much extra power/torque does this your 12MM PLENUM SPACER to suit an ecotec give you??" Michael August 22, 2023 09:14 Updated You would be looking at improvements in torque by around 5% down low. Related articles "I'm after a thermostat but not confident in the correct way to bleed the cooling system. What I'm asking is do they come with instructions?" Comments 0 comments Please sign in to leave a comment.
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