any idea what JAMSA is, as the blokes at seven valley loved my exguast but it was on the car when I had it so I don't know what it is, and did not like to ask them
An exhasut gets jasma ratings if it passes certain emission and sound tests. It has nothing to do with performance or design... What make and model exhaust do you have??
A forum community dedicated to Nissan Skyline GTR owners and enthusiasts. Come join the discussion about performance, mods, troubleshooting, body kits, classifieds, maintenance, and more!