maerijn Posted July 22, 2019 Share Posted July 22, 2019 What is the threadsize of the nuts on a zisco ramhorn? I would like to replace mine but standard Toyota exhaust nuts are a different thread Quote Link to post Share on other sites
batbo Posted January 5, 2020 Share Posted January 5, 2020 Following, also noticed this on mine. Quote Link to post Share on other sites
BurtEP82 Posted February 7, 2020 Share Posted February 7, 2020 I’ve just cleaned my stud holes in the head with m9 1.25 tap and nuts are the same. Don’t see why stud thread would change when fitting a different manifold, unless you mean studs joining manifold to turbo? Quote Link to post Share on other sites
batbo Posted March 16, 2020 Share Posted March 16, 2020 (edited) The threads on the zisco ram horn are not the same as the oem toyota studs - yeah at the turbo side. Edited March 16, 2020 by batbo Quote Link to post Share on other sites
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