I am interested in the manifold and plenum spacers. I've got a turbo charged ecotec with a reverse plenum. Will the spacers fit and what size would you recommend?
Posted by MACE Support on 30 April 2018 09:06 AM
For N/A (naturally aspirated) applications we recommend the 25mm manifold spacer and 12mm plenum spacer.If you are running boost we recommend a 25mm plenum spacer and 12mm manifold spacer, as the thicker plenum spacer does offer even better air distribution between cylinders, which is more critical in boosted cars making lots of HP. note, that bonnet clearance may be a problem running the 25mm plenum spacer and 12mm manifold insulator with the reverse plenum. Therefore you may only be able to get away with running a 12mm plenum spacer and a 12mm manifold insulator or a single 25mm plenum spacer

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