Speedmaster PCE 281.2146 Features:

• Combustion Chamber Volume (cc): 65 cc
• CNC-Machined Combustion Chamber: No
• Intake Runner Volume (cc): 170 cc
• Intake Port Shape: Rectangular
• Intake Port Location: Standard
• Exhaust Port Shape: OEM
• Intake Valves Included: Yes
• Intake Valve Diameter (in): 2.02 in.
• Exhaust Valves Included: Yes
• Exhaust Valve Diameter (in): 1.620 in.
• Valve Springs Included: Yes
• Maximum Valve Lift (in): 0.600 in.
• Outside Diameter of Outer Spring (in): 1.250 in.
• Damper Spring Included: Yes
• Number of Springs Per Valve: Dual
• Retainers Included: Yes
• Retainer Material: Chromoly
• Steel Locks Included: Yes
• Lock Style: 10 degree
• Valve Stem Seals Included: Yes
• Valve Stem Seal Style: Positive stop
• Rocker Arm Studs Included: No
• Rocker Arms Included: No
• Rocker Arm Nuts Included: No
• Guideplates Included: No
• Valve Cover Mounting Style: Center & Perimeter Bolt
• Accessory Bolt Holes Drilled: Yes
• Intake Valve Angle: 18 deg.
• Exhaust Valve Angle: 18 deg.
• Valve Guides Included: Yes
• Valve Guide Material: Bronze
• Valve Seats Machined: Yes
• Valve Seat Machine Style: 3-angle
• Valve Seat Material: Ductile iron
• Steam Holes Drilled: No
• Oiling Style: Through pushrod
• Machined for O-Ring: No
• Heat Crossover: No

Notes:

• RC12YC is the recommended spark plug style for use
• Due to the raised (+.625 in.) exhaust port location, +.100 in. longer bolts/studs are needed next to each port

FAQ:

Are aluminum cylinder heads better?

• Yes, aluminum cylinder heads offer improved heat dissipation and lighter weight, enhancing overall engine performance. Speedmaster PCE281.2146 aluminum heads are a great choice for improved efficiency.

Where are Speedmaster cylinder heads made?

• Speedmaster cylinder heads are manufactured with precision. The PCE281.2146, including Mopar aluminum heads, is crafted to high standards, ensuring quality and performance. Check product details for specific manufacturing locations.

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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