- Designed for any new Gen IV short-block with 4.000″ bore or larger
- The 6-Bolt design is compatible with GM LSX and World LSX blocks
- Accepts Gen IV LS3 valvetrain and intake manifolds.
- Uses a 2.165″ intake valve and 1.600″ exhaust valve
- Has a 256cc intake port
- Has a 69cc combustion chamber standard
- Has a deck thickness of .750″
Each Mast Black Label cylinder head assembly includes:
- A fully CNC machined Mast Black Label aluminum cylinder head
- Mast micro finished .650 lift beehive valve springs
- Mast lightweight stainless steel intake & exhaust valves
- Mast lightweight steel retainers
- Mast machined locks
NOTE: Gaskets, valve covers, rocker arms and pushrods not included
Flow Data w/4.070″ Bore Plate
Lift Intake Exhaust
0.100 77 56
0.200 148 118
0.300 237 165
0.400 295 208
0.500 328 227
0.600 351 235
0.700 370 241
Only logged in customers who have purchased this product may leave a review.
Reviews
There are no reviews yet.