There is a Low Port JDM. One thing I found was that the Crankcase vent tube,( under rightmost header tube) is different. Instead of using my JDm Charcoal Canister, I reworked the JDM tube and cut off the extra and put my US Charcoal Canister on, which has brackets for that other canister that goes over to the air box for fresh air. Darren 91 Classic 02 Spec V