I have for sale a set of TEA Stage 3 5.3 heads 1500 miles on them 58cc chambers with 2.055 intake valves and 1.57 exaust valves along with Comp Cams 921 spring flow numbers are

.100" 67.4 55.1
.200" 143.2 115.3
.300" 211.3 157
.400" 257.3 200.6
.500" 299.1 255.7
.550" 315.2 268.3
.600" 326.5 276
.650" 328.3
.700" 330.1

There some of the best 5.3 heads on the market and make a great addition to anyones motor i made 470 rwhp N/A with Stock LS1 Cubes with a 9inch and a 4l80e 1750 shipped

 

Afternoon bump

 

im guessing you had to fly cut the pistons on the motor you ran these with

 

You would need to if you wanted to run a radical cam like a Ms3 or Ms4

 

Evening Bump

 

Evening bump some one needs these heads