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tri y sizes Hi sheepers. Acording to me the 1uz`s fireing order is 18436572. I am not entirely sure how the cylinders is numberd, but if you are standin in front of the engine and no1 is in fornt at your right, and 2 in front left ect. Then the cylinders in the Thor picture is right? If you...

tri y sizes Hi sheepers. Acording to me the 1uz`s fireing order is 18436572. I am not entirely sure how the cylinders is numberd, but if you are standin in front of the engine and no1 is in fornt at your right, and 2 in front left ect. Then the cylinders in the Thor picture is right? If you...

To optimize your exhaust it is best to join the cylinders that does not fire directly after eachother, to minimize exhauat rivision. With he 1Uz`s firing order, the best spacing is the 180 degree desighn. This is joining the outer cylinders of one bank to the inner cylinders of the other bank...

Y headers Mabe this can help. Note wich cylinders is joined together.