Collector is 2.25 inch (collector pipe is 21 inches long). Tri Y design. Primary tubes are 1 3/4". Headers were sandblasted and then silver ceramic coated.
Datsun engine raced with triple Makuni carbs. Also had a Racer Brown custom cam shaft.
Bung welded into collector for crank case scavenging.
Selling because I went to a SBC V8.