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

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BILL MITCHELL PRODUCTS BMP Cylinder Head

Aluminum Chevy LS-1 Series 255cc 15Degree 2.080″ x 1.600″ (Currently not in production)

The industry’s most efficient replacement for LS1, LS2, and LS6 Cylinder Heads. BMP’s LS Aluminum casting delivers more power than other aftermarket heads in its category.


Key Features

  • Highly efficient 225cc intake (2.080” Valve) and 87cc exhaust ports (1.600” Valve)
  • Available with 64cc combustion chambers
  • Optional CNC-Ported version for increased airflow
  • Available as bare castings or race-ready assemblies
  • Uses stock LS1 rocker arms and OEM stands


Technical Specifications

  • 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
  • Spring Seats: Machined for 1.560″
  • Valve Job: Multi-angle intake and radius exhaust
  • Valve Cover Rail: Raised
  • Exhaust Gasket: Felpro 1438


Flow Data

BMP 235cc LS1 Aluminum Head Flow Data

Valve Lift .200 .300 .400 .500 .600 .700 .800
2.080 Intake 117 180 243 291 294 284 288
1.600 Exhaust 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 Intake 137 201 260 296 313 324 338
1.600 Exhaust 110 157 192 215 230 238 243

* Flow tested using Superflow 600 at 28″ with full CNC porting and 1″ radiused entry plate.

Weight 25 lbs
Dimensions 25 × 10 × 7 in