Call Sam at Japan General Motors, I guess you can have their phone number on their website
JDM Engines | JDM Parts | JDM Imports | JDM Racing | JDM Motors
The guys at Japan General Motors are very helpful always. No charge. Call them. I guess you find their number on their website.
JDM Engines | JDM Parts | JDM Imports | JDM Racing | JDM Motors
Get your engine as stable as you can.. The more aligned the more muffler no-leakage, the more everything will bring your engine to "concentrate" or "focus" more on its power to your benefit.
Good luck
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