Please verify that your exhaust ports are splayed, and do not come straight forward out of the head.  XJ400 models from outside of the US may have parallel exhaust ports which will not be compatible with this set of pipes.  If your pipes come straight out of the head, not at an angle, you will likely need an XS400 exhaust system.

• Improves performance by increasing power, along with decreasing weight
• Increased ground clearance
• Does not block center stand, oil filter or drain plug access
• Removable all steel, mechanical baffle
• NOTE: Please verify that you head is splayed (not parallel). XS and XJ engines vary by country..
• NOTE: Exhaust gaskets are not included, but may be purchased separately if required..
• NOTE: Carburetor re-jetting may be desired for best performance.

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Thanks from Niche Cycle - St. Petersburg Florida