Bill Mitchell Products BMP 025150-2S – Cylinder Head Aluminum Chevy LS1 235cc 64cc 15Degree 2.080″ x 1.600″ Assembly

Bill Mitchell Products BMP 025150-2S – Cylinder Head Aluminum Chevy LS1 235cc 64cc 15Degree 2.080″ x 1.600″ Assembled

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 235cc intake (2.080” Valve) and 87cc exhaust ports (1.600 Valve) provide outstanding flow. Available with 64cc combustion chambers.

Assembled with Manley Stainless steel valves, Erson Professional series polished valve springs, Steel 7 degree locks, iron clad seals.

Spring specs: 1.290″ Dual Spring – 150#@1.810″ – 400#@1.150″ – 1.100″C/B – 378S/R – .660 Max Lift

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
• Springs: Erson High Lift Hydraulic .660″ max lift
• Guide Plates: N/A
• Rocker Arm Studs: N/A
• Rocker Arms: Accept OEM style
• Intake runner : 235cc Standard port location
• Exhaust Ports: 87cc standard location
• Valve Pockets: Blended
• 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 — 296 — 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.