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LSXCELERATION

Mast Black Label GM LS7 305cc/70cc 12° CNC Cylinder Heads w/ Tall Valves /Solid Roller - Jesel Pattern - CH-LS7-600223

PART NUMBER:
CH-LS7-600223
MPN:
CH-LS7-600223
Availability:
Ships from Manufacturer
Type:
LS7 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 (°):
11
Intake Runner Volume (cc):
305
Exhaust Runner Volume (cc):
106
Chamber Volume (cc):
70
Intake Valve (in.):
2.250
Intake Material:
Stainless Steel
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 Type:
Newen CNC 5 Angle
Rocker Stands Included:
Yes
Rocker Stand Material:
Mast Billet
Valve Springs Included:
Yes
Valve Spring Type:
Dual
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
  • Mast Black Label GM LS7 305cc/70cc 12° CNC Cylinder Heads w/ Tall Valves /Solid Roller - Jesel Pattern - CH-LS7-600223
  • Mast Black Label GM LS7 305cc/70cc 12° CNC Cylinder Heads w/ Tall Valves /Solid Roller - Jesel Pattern - CH-LS7-600223
  • Mast Black Label GM LS7 305cc/70cc 12° CNC Cylinder Heads w/ Tall Valves /Solid Roller - Jesel Pattern - CH-LS7-600223
  • Mast Black Label GM LS7 305cc/70cc 12° CNC Cylinder Heads w/ Tall Valves /Solid Roller - Jesel Pattern - CH-LS7-600223
  • Mast Black Label GM LS7 305cc/70cc 12° CNC Cylinder Heads w/ Tall Valves /Solid Roller - Jesel Pattern - CH-LS7-600223
  • Mast Black Label GM LS7 305cc/70cc 12° CNC Cylinder Heads w/ Tall Valves /Solid Roller - Jesel Pattern - CH-LS7-600223
  • Mast Black Label GM LS7 305cc/70cc 12° CNC Cylinder Heads w/ Tall Valves /Solid Roller - Jesel Pattern - CH-LS7-600223
  • Mast Black Label GM LS7 305cc/70cc 12° CNC Cylinder Heads w/ Tall Valves /Solid Roller - Jesel Pattern - CH-LS7-600223
  • Mast Black Label GM LS7 305cc/70cc 12° CNC Cylinder Heads w/ Tall Valves /Solid Roller - Jesel Pattern - CH-LS7-600223
  • Mast Black Label GM LS7 305cc/70cc 12° CNC Cylinder Heads w/ Tall Valves /Solid Roller - CH-LS7-600222
$4,799.00

Description

Mast Black Label GM LS7 305cc/70cc 12° CNC Cylinder Heads w/ Tall Valves /Solid Roller - Jesel Pattern - CH-LS7-600223

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: 5.550"
  • Valve Angle: 12°
  • Valve Spring Pocket Diameter: 1.65"
  • Valve Spring Install Height: 1.900" (+)
  • 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: 254 CFM @ 0.700"
  • Intake Average Flow: 265 CFM
  • Exhaust Average Flow: 177 CFM
  • Intake Seat Material: Ductile Iron
  • Intake Port Volume: 305cc
  • 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

Valve Spring Kit 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

 

 

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