725 SOUTH LA CADENA DRIVE COLTON CA USA 92324
909.291.7550

CBM MOTORSPORTS™ GM LSX / LS7 CNC PORTED COMPLETE 6 BOLT CYLINDER HEADS .660

CBM MOTORSPORTS™ GM LSX / LS7 CNC PORTED COMPLETE 6 BOLT CYLINDER HEADS .660

Part Number: CBM-GM-CNC-LSX-660

Price: $3,299.99
In Stock
Quantity:

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CBM MOTORSPORTS™ GM LSX / LS7 CNC PORTED COMPLETE 6 BOLT CYLINDER HEADS .660CBM MOTORSPORTS™ GM LSX / LS7 CNC PORTED COMPLETE 6 BOLT CYLINDER HEADS .660CBM MOTORSPORTS™ GM LSX / LS7 CNC PORTED COMPLETE 6 BOLT CYLINDER HEADS .660
CBM MOTORSPORTS™ GM LSX / LS7 CNC PORTED COMPLETE 6 BOLT CYLINDER HEADS .660CBM MOTORSPORTS™ GM LSX / LS7 CNC PORTED COMPLETE 6 BOLT CYLINDER HEADS .660CBM MOTORSPORTS™ GM LSX / LS7 CNC PORTED COMPLETE 6 BOLT CYLINDER HEADS .660

CBM MOTORSPORTS™ GM LSX / LS7 CNC PORTED COMPLETE 6 BOLT CYLINDER HEADS .660 Product Description:


CBM Motorsports™ CNC ported aluminum cylinder heads for the LS series small block V8 engines will unleash the horsepower, torque and performance that your LS engine is capable of. These LSX / LS7 heads are capable of well over 1000hp on forced induction applications. We start with a GM bare casting and fully CNC port all intake and exhaust runners. From there they get assembled and tested before they are packaged ensuring great heads arrive the first time. To compliment these high end 6 bolt heads we use stainless steel valves and Manley Nextec springs. These heads flow nearly 400 CFM!!!

Overview

Brand: CBM Motorsports
Part Numbers: CBM-GM-CNC-LSX-660
Other Part Numbers: GM-CNC-LSX-660
Part Type: Cylinder Heads
Cylinder Head Style: Complete
Cylinder Head Material: Aluminum
Cylinder Head Finish: Natural
Combustion Chamber Volume (cc):  70
CNC-Machined Combustion Chamber: Yes
Intake Runner Volume (cc): 285cc
Exhaust Runner Volume (cc): 90cc
CNC-Machined Intake Runner: Yes
CNC-Machined Exhaust Runner: Yes
Combustion Chamber Style: Open
Intake Port Shape: Rectangular
Intake Port Location: Standard
Exhaust Port Shape: D-port
Exhaust Port Location: Standard
Intake Valves Included: Yes
Exhaust Valves Included: Yes
Valve Springs Included: Yes
Damper Spring Included: Yes
Retainers Included: Yes
Locks Included: Yes
Valve Stem Seals Included: Yes
Rocker Arm Studs Included: No
Rocker Arms Included: No
Rocker Arm Nuts Included: No
Guideplates Included: No
Accessory Bolt Holes Drilled: No
Valve Guides Included: Yes
Valve Seats Machined: Yes
Steam Holes Drilled: Yes
Oiling Style: Through Pushrod
Heat Crossover: No
Quantity: Sold in Pairs
In Store Pickup: Colton, CA, USA

Application

Assembly Specifications

Assembly Specifications:

Stainless Steel Exhaust Valves.

  • Type: Exh.
  • Head Diameter: 1.610
  • Stem Diameter: .3136
  • Installed Height : Stock
  • O/A Length: 5.230
  • Tip Length: .290
  • Underhead Angle / Radius: 25° x 7/16”
  • Margin: .075
  • Seat Width: .100
  • Top of Head: 18° Dish
  • Wgt/Grams: 103

Stainless Steel Intake Valves.

  • Type: Int.
  • Head Diameter: 2.205
  • Stem Diameter: .3133
  • Installed Height : Stock
  • O/A Length: 5.200
  • Tip Length: .300
  • Underhead Angle / Radius: 12° x 3/8”
  • Margin: .050
  • Seat Width: .085
  • Top of Head: 7° Dish
  • Wgt/Grams: 120

Manley Nextek Valve Springs.

  • Max Valve Lift: .660"
  • OD: 1.295”
  • ID: .676"
  • Installed: 155 @ 1.810
  • Open Pressure: 405 @ 1.150
  • Rate (lbs/in): 379
  • Coil Bind: 1.100

Manley Titanium Retainers.

  • Valve Stem Diameter: .3133"/.3136"
  • Degree: 7°
  • Dimension A: 1.155”
  • Dimension B: .950”
  • Dimension C: .675”
  • Height: Stock

Manley I.D. Valve Spring Locators.

  • Locator ID: .505”
  • Locator OD: 1.270”
  • Thickness: .035
  • Shoulder Diameter: .675

Manley Machined Valve Locks.

  • Valve Stem: .3133"/.3136"
  • Groove Type: Bead Lock
  • Angle: 7°
  • Wgt/Pr: 2.6gms

Download specifications and flow chart here.

 

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