CBM Motorsports™ Pro-X™ CNC ported aluminum cylinder heads will unleash the horsepower, torque and performance that your LS engine is capable of. CBM Motorsports™ Pro-X™ 4 bolt cylinder heads for LS style engines are designed for 4.065” or larger bores and LS3/L92 intake ports they also feature a raised rocker rail for improved rocker arm/valve cover clearance and are capable of making well over 1000hp. We 100% CNC port all intake and exhaust runners, blend the bowls and match the ports.
The combustion chambers and ports have been carefully designed to achieve the very best combination of high flow capabilities along with outstanding port velocity. An improved deck thickness provides greater forced induction durability and reliability. CBM/REV stainless steel valves, Manley springs, retainers, locator's and locks. CBM/Jesel Pro Series Rocker Arms make CBM Motorsports™ Pro-X™ heads for the LS a winning combination and ready to race.
After assembly and inspection the heads are packaged and shipped with care insuring you receive a killer pair of cylinder heads intact, as ordered and on time.
Cylinder Head Style:
- Complete With Rockers (includes all valves, springs, retainers, locator's, locks, rocker arms, pedestals and bolts.).
- These cylinder heads ship assembled.
Available in a aftermarket 6 bolt or 4 bolt (standard) pattern.
CBM Motorsports™ Pro-X™ CNC Ported 6 Bolt LS3 Cylinder Heads Complete with Rockers
- Brand: CBM Motorsports
- Part Number: CBM-PROX-C-WR-6
- Other Part Number: PROX-C-WR-6
- Part Type: Cylinder Heads
- Cylinder Head Style: Complete with rockers
- Assembly Required: No
- Cylinder Head Material: Aluminum
- Cylinder Head Finish: Natural
- Combustion Chamber Volume (cc): 70cc
- CNC-Machined Combustion Chamber: Yes
- Intake Runner Volume (cc): 280cc
- Exhaust Runner Volume (cc): 105cc
- 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
- Valve Seats Machined: Yes
- Steam Holes Drilled: Yes
- Oiling Style: Through Pushrod
- Heat Crossover: No
- Accessory Bolt Holes Drilled: Yes
Complete with Rockers Includes
- Cylinder Heads
- Intake Valves
- Exhaust Valves
- Valve Springs
- Damper Spring
- Retainers
- Locks
- Valve Stem Seals
- Rocker Arm Studs
- Rocker Arms
- Rocker Arm Nuts
- Guideplates
- Valve Guides
Notes
- Quantity: Sold In Pairs
- In Store Pickup: Colton, CA, USA
CBM/R.E.V. Lightweight Stainless Steel Intake Valves.
- Head Diameter: 2.200"
- Stem Diameter: .3133"
- O/A Length: 5.453"
- Tip Length: .290"
- Underhead Angle / Radius: 12° x 3/8”
- Margin: .070"
- Seat Width: .100"
- Top of Head: 7° Dish
- Groove Type: Bead Roll
- Valve Material: 21-4n Stainless steel
- Wgt/Grams: 131gms
CBM/R.E.V. Lightweight Stainless Steel Exhaust Valves.
- Head Diameter: 1.600"
- Stem Diameter: .3136"
- O/A Length: 5.453"
- Tip Length: .290"
- Underhead Angle / Radius: 25° x 7/16”
- Margin: .065"
- Seat Width: .100"
- Top of Head: 18° Dish
- Groove Type: Bead Roll
- Valve Material: 21-4n Stainless steel
- Wgt/Grams: 102gms
Manley Professional Valve Springs.
- Max Valve Lift: .700"
- OD: 1.550”
- ID: .725"
- Installed Pressure: 225 @ 1.950”
- Open Pressure: 580 @ 1.250”
- Rate (lbs/in): 507
- Coil Bind: 1.190"
- Wgt/Pr: 159gms
Manley Titanium Retainers.
- Valve Spring Diameter: 1.550”"
- Degree: 10°
- Dimension A: 1.500”
- Dimension B: 1.105”
- Dimension C: .710”
- Height: std.
Manley I.D. Valve Spring Locator's.
- Locator ID: .570”
- Locator OD: 1.535”
- Thickness: .062"
- Wall Shoulder Height: .140"
- Shoulder Diameter: .720"
Manley Machined Valve Locks.
- Valve Stem Diameter: 0.311"
- Groove Type: Bead Loc
- Angle: 10°
- Wgt/Pr: 3.9gms
Jesel Pro Aluminum Series Rocker Arms.
- Type: Shaft Roller
- Material: Jesel 7000 Series.
- Finish: Shotpeened.
- Mounting Hole: 7/16”
- Rocker Ratio: 1.75”/1.75”
- Rocker Body: Standard Slot 1.650 Pivot BB Rocker
- Wgt/Pr: 202gms
Download specifications and flow sheet here.
Designed for LS style engines with a 4.065” or larger bore and LS3/L92 intake ports.
CBM Motorsports™ products are warranted to be free from defects in material and workmanship for a period of 90 days from the date of purchase. CBM Motorsports™ electronic components and products are warranted to be free from defects in material and workmanship for a period of 30 days from the date of purchase. If the any part does not meet the limited warranty criteria an RMA number will have to be initiated to set up an exchange or refund.
The part must be returned to CBM with an RMA number assigned to it, and if it is in acceptable condition, CBM will issue credit directly to the customer. In addition, CBM Motorsports™ limited warranty specifically does not apply to products which have been modified or altered in any way, subjected to adverse conditions such as misuse, neglect, accident, improper installation or adjustment, dirt or other contaminants, water, corrosion or faulty repair, or used in racing activities or competitive applications other than those recommended by CBM Motorsports™ . This warranty does not warrant and disclaims all liability for products used in racing activities and/or applications, other than those specifically recommended by CBM Motorsports™.
