LT4 Medium Bore Black Label | Single CNC Cylinder Head

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  • Regular price $ 1,000.00
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Available October 2020 - pre-order & Save Now, our pre-order discount won't last long.

Mast Designed, Manufactured, and Cast LT Black Label Heads. 

New for 2020, Mast Engineering Team, adds in the legendary performance of its Black Label product line, and adds in our very own LT Performance Aftermarket Cylinder Head

100% DESIGNED, CAST, MACHINED in the USA. 

No fake made in the USA here. 


The ultimate upgrade for your LT4 flowing over 380 CFM.  Mast Motorsports LT4 Medium Bore Black Label heads are at the forefront of power and performance.  Designed from a clean sheet this head is a direct replacement for your stock heads and supports 1000+ horsepower on LT4 engines with supporting modifications.  If you are looking to upgrade your Gen V LT4 with the best aftermarket LT head on the market, look no further.  



  • Designed for Gen V LT short-blocks with 4.000" bore or larger
  • Compatible with GM Gen V LT
  • Accepts Gen IV LT valvetrain and LT4 Superchargers
  • Uses a 2.165" intake valve and 1.600" exhaust valve
  • Has a 292cc intake port
  • Has a 59.8cc combustion chamber standard
  • Has a deck thickness of .750"
  • Cast & Machined in the USA!
Flow Data | 84°F, 30.51 in HG, 36% Humidity
Lift Intake Exhaust
0.100 71.4 49.5
0.200 141.8 103.0
0.300 225.4 151.0
0.400 289.7 188.7
0.500 333.5 202.0
0.550 336.6 209.1
0.600 346.8 214.2
0.650 355.0 219.3
0.700 362.1 221.3
0.750 368.2 221.3
0.800 376.4 223.4
0.850 382.5 222.4
0.900 384.5 222.4

 

 



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