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|