A set of heavy duty exhaust manifold fasteners and washers.    
 
A better washer design than the stamped curved originals.
 
Includes yellow zinc lockwashers and yellow zinc 12mm wrench nuts (zinc plated) or  high strength 1/2" nuts for SAE kits.  Yellow zinc if you prefer a more original look.
 
Both SAE and Metric sets available.
 
The thick washers in this set are flat in cross section unlike the later style stamped Nissan washers.   Heavy press stamping created the curved cross section and Nissan later abandoned the stamped cross section for later designs.   Early roadsters used a thick stepped flat washer as well and there is absolutely no need for a curved front cross section.    -  If you need those, just ask, we have them too.
 
Since we ARE both mechanical and electrical engineers, and we actually install and run the parts we manufacture, you can trust these parts will work perfectly.
 
If you need technical/design information or assistance installing this product, just give us a call and we’ll be glad to discuss and assist!
 
2nd photo shows the excellent fit of these parts.