Mast Motorsports LS7 285 Black Label heads are designed for boosted 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 285 head is a great choice.
- Solid Stainless Intake Valves
- Solid Stainless Exhaust Valves
- Premium Dual Spring Kit
- Rocker Stands for GM Rocker Arms
Dyno proven power.
- Utilizes the Gen IV LS7 OEM rockers and accepts LS7 intake manifolds
- Designed for any new Gen IV short-block with 4.125" bore or larger
- The 6-bolt design is compatible with GM LSX and RHS Blocks
- Uses a 2.200" intake valve and 1.600" exhaust valve
- Has a 285cc intake port
- Has a deck thickness of .750"
- 70cc Combustion Chamber Standard
***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