Our header is a 4 into 1 long tube design. This is one of the best “seat of the pants” upgrades you can do. If you want affordable quality, this is the header for you. This header should yeild as much as 15% more horsepower. This along with the Weber Carb is the two best things you can do for your Samurai for more power. Header has meaty 3/8″ flange and comes with a collector and gasket.