GM 5.3L Stage 2

September 25, 2020 by  
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SKU: ab59b066efca Category:


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.

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

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

Additional information

Weight 60 lbs


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