Tested on 4.375 bore, 28" test pressure, radius plate on intake:

Lift---------I/E-----w-2" tube
.100---78.6/56.1
.200--165.6/114.6
.300--234.4/164.7
.400--286.8/203.7
.500--304.8/232.4--245.7
.550--319.7/238.8--255.1
.600--334.5/246.4--261.5
.650--345.9/253.3--267.2
.700--346.7/255.1--272.9
.750--347.8/257.8--277.8
.800--350.4/260.8--280.4

Vs there advertised


355cc int port vol
Flow tests below show results from our SAENZ 680 Flow Bench

Lift Stock Intake CFM CNC'd Intake CFM CFM Gained Stock Exhaust CFM CNC'd Exhaust CFM CFM Gained
.100 74.4 79 5 63.7 77.9 14.2
.200 137.0 164 30 115.2 129.5 14.3
.300 191.7 245 43.3 167.4 183.8 16.4
.350 220.1 270 47.9 192.5 208.2 15.7
.400 247.8 300 45.2 212.5 234.7 22.2
.450 273.9 328 43.1 226.6 256.6 30
.500 293.8 351 53.2 234.6 273.8 39.2
.550 309.5 366 45.5 238.3 287.1 48.8
.600 310.7 380 65.3 241.8 296.4 54.6
.650 311.0 391 73.0 243.9 305.4 61.5
.700 316.4 397 79.6 244.9 312.4 67.5
.750 318.6 397 60.4 246.0 317.7 71.7
.800 322.0 406 86 246.7 322.4 75.7