Mast Motorsports
Mast Black Label GM LS 295cc/70cc 12° CNC Cathedral Port Cylinder Heads w/Titanium Intake/Solid Roller - CH-LS1-600234
- PART NUMBER:
- CH-LS1-600234
- MPN:
- CH-LS1-600234
- Availability:
- Ships from Manufacturer
- Shipping:
- Free Over $98 In U.S. 48
- Type:
- Cathedral Port Cylinder Heads
- Material:
- A356-T6 Aluminum
- CNC Machined Intake Runner:
- Yes
- CNC Machined Exhaust Runner:
- Yes
- CNC Machined Combustion Chamber:
- Yes
- Minimum Bore Size (in.):
- 4.125
- Bolts Per Cylinder:
- 6
- Assembled:
- Optional
- Valve Angle (°):
- 12
- Intake Runner Volume (cc):
- 295
- Exhaust Runner Volume (cc):
- 106
- Chamber Volume (cc):
- 70
- Intake Valve (in.):
- 2.250
- Intake Material:
- Titanium
- Exhaust Valve (in.):
- 1.600
- Exhaust Material:
- Stainless Steel
- Valve Guides Included:
- Yes
- Valve Guides Material:
- Bronze
- Intake Seat Material:
- Ductile Iron
- Exhaust Seat Material:
- Ductile Iron
- Valve Job:
- 5-Angle
- Rocker Stands Included:
- Yes
- Rocker Stand Material:
- Mast Billet
- Valve Springs Included:
- Yes
- Valve Spring Type:
- OD Dual Valve
- Valve Spring Max Lift (in.):
- 0.800
- Closed Spring Pressure:
- 2.000" @ 250 lbs.
- Open Spring Pressure:
- 1.200" @ 775 lbs.
- Retainers Included:
- Yes
- Spring Retainer Material:
- Titanium
- Quantity:
- Sold as a Pair
Description
Mast Black Label GM LS 295cc/70cc 12° CNC Cathedral Port Cylinder Heads w/Titanium Intake/Solid Roller - CH-LS1-600234
Mast Motorsports offers the most comprehensive LS & LT Line of Cylinder Heads. Starting with a raw casting, and complete the machining process 100% in house. Mast designs and manufacture their castings exclusively with their foundry partner. Mast Castings have been designed to withstand the extremes of all forms of racing and performance. Manufactured from A356 T6 Material, they are fully heat treated and pressure tested. Mast completes the manufacturing process using state of the art Hurco 5 Axis CNC machines – from raw casting to completed head in Nacogdoches, Texas. A premium casting and cylinder isn’t complete unless you match it with premium components. Mast exclusively utilizes Made in the USA CHE Valve Seats and Valves Guides to complement the premium Black Label Cylinder Heads. There is no question CHE offers the best and finest in materials, machining, and longevity that ensures years of performance and quality. Finishing and valve jobs are completed using only the best CNC valve job process utilizing a Newen CNC valve cutting machine.
Dimensional Specs
- Bore Size: 4.125" (+)
- Weight: 27.5 lbs.
- Intake Valve Size: 2.250"
- Exhaust Valve Size: 1.600"
- Valve Stem Diameter: 5/16"
- Valve Length: 5.450"
- Valve Angle: 12°
- Valve Spring Pocket Diameter: 1.65"
- Valve Spring Install Height: 1.800"
- Head Stud Size: .493"
- Valve Guide OD: .502"
- Valve Job Type: Newen CNC 5 Angle
Air Flow & Performance Criteria
- Intake Max. Flow: 405 CFM @ 0.700"
- Exhaust Max. Flow: 248 CFM @ 0.700"
- Intake Average Flow: 264 CFM
- Exhaust Average Flow: 176 CFM
- Intake Seat Material: Ductile Iron
- Intake Port Volume: 295cc
- Exhaust Port Volume: 106cc
- Standard Chamber Volume: 70cc
- Port Type: CNC
Materials
- Cylinder Head Material: A356-T6 Aluminum
- Intake Valve Seat Material: Ductile Iron
- Exhaust Valve Seat Material: Ductile Iron
- Deck Thickness: .750"
- Rocker Stand Type: Mast Billet
- Rocker Arm Type: OE LS7 1.8 or Aftermarket
- Guide Material: Phosphor Bronze
General
- Rocker Stand Type: Mast Billet
- Rocker Stands Included: Yes
- Rocker Stand Dowels Included: Yes
- Uses Stock Rocker Bolts: No
- Rocker Bolts Included: No
- Rocker Arm Type: OE LS7 1.8 or Aftermarket
- Head Bolt QTY: 6 Bolt Style
- Valve Cover Rail Height: + ½ inch
- Can use OE Valve Cover: Yes
Solid Roller Information
1.525 OD - Dual Drag Race Valve Spring & Titanium Retainer Kit
Utilize all the valve spring space that Mast Motorsports Cylinder heads offer.
Choose the dual drag race valve spring kit that pros use. Mast Motorsports designs all of its cylinder heads to accommodate a professionally sized racing valve spring. No more trying to cram a valve spring into your LS spring pocket, which may prove to be inferior.
Kits Comes Complete with:
- 1.525 OD Dual Valve Springs - Standard Finish
- Titanium Spring Retainer
- Steel Valve Locks
- Hardened Valve Spring ID Locator
- 805V - Valve Stem Seals
Kit Specifications
- Installed Height & Load @ 2.000" @ 250 lbs
- Open Height & Load @ 1.200" @ 775 lbs
- Valve Lift- Maximum 0.800" Lift
- Retainer Weight
- Retainer Lock Style - 8 degree - Mini Locks
*** Requires (+) 0.100 - 5.550" Length Valve for Mast Cylinder Heads
Custom Options Available
- Chamber Softening
- Custom Chamber Sizing
- ½ inch head stud clearance
- Copper Exhaust & Intake Valve Seats
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