The 225 LS-2 heads feature all of the same design advantages of the LS-1 with the addition of a 4.00" bore combustion chamber, 2.055" intake valve, 225cc intake runner,and a 65cc combustion chamber volume. We also offer a 70cc chamber option for forced induction applications.
Note:Flow numbers are based off of an average of 5 heads tested. All flow numbers are tested on a 4.030" fixture @28"h20, using an intake radius plate, and a 4"x 1-7/8"pipe on exhaust.
| FLOW DATA 4.030" BORE | ||||||||||||||||||||||||
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| * Tests conducted at 28" of water, 4.030" bore, 1.875" exh. pipe |
STANDARD FEATURES
- Material: A356-T6 Aluminum
- Combustion Chamber Volume: 65cc CNC-profiled Standard
- Intake Port Volume: 225cc CNC Ported
- Intake Port Location: OEM
- Intake Valve Diameter: 2.055
- Intake Valve Seat: Interlocking Ductile iron
- Exhaust Port Volume: 80cc CNC Ported
- Exhaust Port Location: OEM
- Exhaust Port Dimensions: 1.460" x 1.6700"
- Exhaust Gaskets: Stock Gm
- Exhaust Valve Diameter: 1.575"
- Exhaust Valve Seat: Ductile iron
- Valve Guide Material: Bronze alloy
- Valve Seals: Viton® fluoroelastomer
- Minimum Bore Diameter: 4.000" recommended
- Cylinder Head Bolts: OE Length
- Spark Plugs: NGK-TR6 or Equivalent
- Valve Covers: OE bolt pattern, raised 0.200"
