Bill Mitchell Products BMP 025150C – Cylinder Head Aluminum Chevy LS1 255cc 64cc 15Degree 2.080″ x 1.600″ CNC PORTED(DISCONTINUED)

BILL MITCHELL PRODUCTS BMP Cylinder Head Aluminum Chevy LS-1 Series 255cc 15Degree 2.080″ x 1.600″ (Currently not in production)

Clearly the industry’s most efficient replacement for LS1, LS2, and LS6 cylinder Head, BMP’s LS Aluminum casting delivers more power than other aftermarket Head in its category. The highly efficient 225cc intake (2.080” Valve) and 87cc exhaust ports (1.600 Valve) provide outstanding flow. Available with 64cc combustion chambers.

Want even more flow and power? BMP offers Aluminum LS 15° Head that are CNC-ported. The intakes have been enlarged to 255cc runners while the exhaust side has also been enhanced. Available as bare castings or in race-ready assemblies that have a multi-angle valve job and radiused exhaust, are equipped with Manley stainless steel valves, high performance springs and Manley chrome moly retainers. Uses stock LS1 rocker arms and OEM stands.

Available Assemblies are listed in the option section to the right

025150C-2 , 025150C-3

TECHNICAL SPECS

• Casting ID Number: WOR-075
• Material: 355-T6 alloy high density aluminum
• Valve Seats: Intake (hardened), exhaust (hardened)
• Valve Guides: Manganese bronze
• Valve Size: 2.080 Intake 1.600 Exhaust
• Valve Angle: 15 Degrees
• Valve Seat Angle: 45 Degrees
• Spring Seats: Machined for 1.560″
• Valves: Manley stainless steel valves in assemblies
• Guide Plates: N/A
• Rocker Arm Studs: N/A
• Rocker Arms: Accept OEM style
• Intake runner : 235cc or 255cc Standard port location
• Exhaust Ports: 87cc standard location
• Combustion Chamber: 64cc
• Spark Plug: 14mm .708″ reach taper style, Accel P526S
• Valve Job: Multi-angle intake and radius exhaust
• Valve Cover Rail: Raised
• Exhaust Gasket: Felpro 1438

BMP 235cc LS1 Aluminum Head Flow Data 
Valve Lift — .200 –.300 –.400 –.500 –.600 –.700 –.800 
2.080 ——- 117 — 180 — 243 — 291 — 294 — 284 — 288 
1.600 ——-   90 — 128 — 156 — 171 — 180 — 186 — 189

BMP 255cc LS1 Aluminum Head Flow Data CNC PORTED
Valve Lift — .200 –.300 –.400 –.500 –.600 –.700 –.800 
2.080 ——- 137 — 201 — 260 — 296 — 313 — 324 — 338 
1.600 ——- 110 — 157 — 192 — 215 — 230 — 238 — 243 
Methods used: Superflow 600, Flowed at 28″ with full CNC porting, 1″ radiused entry plate on the intake port, No exhaust tube, Using Manley Severe Duty valves. Flowed By GT Cylinder Head Sophia, NC

Heads are sold individually.