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Bill Mitchell Products BMP 025350 – Cylinder Head Aluminum Chevy LS7 Block 285cc 64cc 12Degree 2.250″ x 1.625″

$677.36

BILL MITCHELL PRODUCTS BMP Cylinder Head Aluminum  Chevy LS-7 Series 285cc 12Degree 2.250″ x 1.625″

For maximum performance from an LS-series engine, BMP’s LS Aluminum 12 Degree Head are the answer. Using superior Port design featuring 285cc Intake & 106cc exhaust runners that flow incredible numbers. 


If even more flow is desired BMP offers a CNC Ported version that boast 296cc Intake & 110cc Exhaust runners. They are Dyno proven to crank out the power! 

An important feature of the BMP 12 Degree head is that it comes with TWO EXTRA BOLT HOLES per cylinder (same as BMP LS Blocks) to provided extra sealing for power adder-boosted high combustion pressure applications.

Available Assemblies are listed in the option section to the right

025350-2 , 025350-3 , 025350-4

TECHNICAL SPECS

  • Casting ID Number: WOR-076
  • Material: 355-T6 alloy high density aluminum
  • Valve Seats: Intake (hardened), exhaust (hardened)   
  • Valve Guides: Manganese bronze   
  • Valve Size: 2.250 Intake 1.625 Exhaust
  • Valve Angle: 12 Degrees
  • Valve Seat Angle: 50 Degrees
  • Spring Seats: Machined for 1.560″ (can be machined to 1.650)   
  • Valves: Manley stainless steel valves in assemblies   
  • Guide Plates: N/A
  • Rocker Arm Studs: N/A
  • Rocker Arms: Jesel # KPS499187, T&D # 2351
  • Intake runner : 285cc or 296cc Standard port location   
  • Exhaust Ports: 106cc or 112cc, 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 1440

BMP 285cc LS7 Aluminum Head Flow Data 
Valve Lift — .200 –.300 –.400 –.500 –.600 –.700 –.800 
2.250 ——- 123 — 194 — 256 — 304 — 333 — 354 — 335 
1.625 ——-   66 — 111 — 148 — 175 — 193 — 203 – 211

BMP 296cc LS7 Aluminum Head Flow Data CNC PORTED
Valve Lift — .200 –.300 –.400 –.500 –.600 –.700 –.800 
2.250 ——- 130 — 205 — 265 — 325 — 365 — 379 — 397 
1.625 ——-   92 — 131 — 167 — 190 — 212 — 231 — 249 

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.

Weight 35 lbs

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