GM 5.3L Stage 2

Description PN: TEA-OEM5.3ST2-CUSTOM GM Factory 5.3L 862,706 Our stage 2 CNC program is built using our latest valve job and port design for the 5.3L GM cylinder head castings. This head is famous and formerly known as the TEA 1.5 and is built for the 5.7 or 3.900 and larger bores. 220cc Intake runner is redesigned and the 1.89″ valve is replaced with a 2.040 intake valve while the stock 1.55 exhaust valve is reused. This head makes great power N/A and works great with camshafts up to 230*@ .050 with stock pistons. STANDARD FEATURES Disassemble and clean Fully CNC port Intake and exhaust runners and chambers (64cc) Competition 4 angle multi angle valve job Precision grind all exhaust valves and backcut intake valve 8 Ferrea 2.040″ stainless intake valves included Hand blend valve job into porting Flow test with sheet included PCD Flat mill decks – additional milling available Custom Blueprint Assembly insuring all assembly heights and spring pressures are correct TEA/PAC racing Dual .650″ spring kit with Titanium retainers FLOW DATA 3.900″ BORE Lift Intake Exhaust 0.100 68 59 0.200 140 132 0.300 211 172 0.400 265 214 0.500 298 238 0.550 304 244 0.600 312 248 * Tests conducted at 28″ of water, 3.90″ bore, 1.875″ x 4.0″Exh. pipe Customer will need to supply their cores Oversize valves and optional springs are available Give us a call at 330-634-2155 Send us an email at [email protected]