AFR 1680/1690 LS1 245/65 OR 73CC .650 LIFT ASSEMBLED YOUR CHOICE OF CHAMBER SIZE

CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS.  Our max effort cathedral port head for the LSX platform is recommended for race applications or radical "Pro Street" builds with displacements up to 454 cubic inches, operating at or below 6800 RPM. Requires a minimum bore size of 4.000" to clear the supplied 2.165" intake valve. 245cc Aluminum LS1 Cylinder Heads Part # Description Combustion Chamber 1680 Large Bore (4.000+) 65cc 1690 Large Bore (4.000+) 73cc Click part # to add product to your cart 245cc Street Head Flow Chart   .200 .300 .400 .500 .550 .600 .650 Int 164 233 290 332 347 356 360 Exh 131 185 227 247 249 257 267 Test conducted at 28" of water (pressure) on Superflow 600Bore Size: 4.155", 3/4" radius plate exhaust, 1 3/4" curved pipe Basic Package Components 100% CNC Ported Combustion Chambers 100% CNC Ported Exhaust Ports 100% CNC Ported Intake Ports Competition 5-angle Valve Job 8mm Bead Lock Intake Valve, 2.165" x 4.900" O