Intake manifold, 25mm. Most commonly (though not exclusively) used for 50cc, 70cc, 90cc, 110cc, 125cc and 150cc ATVs, dirt bikes, go karts / buggies, scooters and other motorized products with 19mm to 26mm carburetors. Commonly used in conjunction with PZ19 - PZ25 series carburetors. Chamber opening is 25.6mm in diameter, with mounting holes 4.8mm and 4.5mm apart from centre-hole to centre-hole.