LS7 305 | Assembled Pair of Cylinder Heads – Mast Motorsports
Cast | Machined | Built in the USA

LS7 305 | Assembled Pair of Cylinder Heads

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  • $ 3,900.00



Mast Motorsports LS7 305 Black Label heads are designed for all-out naturally aspirated 4.125"+ bore engines.  If you are looking to make more power with your LS7, LSX or other 4.125" engine, the Black Label LS7 305 head is a great choice.

600hp to the tire is easily attainable with this head, proper cam and headers on 427ci engines.

💪 Dyno proven power. 💪

 

  • Utilizes the Gen IV LS7 valve-train and intake manifold
  • Designed for any new Gen IV short-block with 4.125" bore or larger
  • Uses a 2.250" intake valve and 1.600" exhaust valve
  • Has a 294cc intake port
  • Has 70cc combustion chamber
  • Has a deck thickness of .750"

***Due to the thicker deck and higher valve cover rails some beauty covers are not compatible.  When using Corvette (Y-Body) front accessories alternator may need to be clearanced. 

Flow Data w/4.125" Bore Plate
Lift Intake Exhaust
0.100 76 65
0.200 163 118
0.300 245 171
0.400 307 212
0.500 350 229
0.600 379 245
0.650 388 247
0.700 395 249
0.800 401.5 258
0.900 406 260
1.000 410 263

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