670HP 265cc LS2 LS3 L92 RECTANGLE PORT CYLINDER HEADS - 15 deg valve angle - PAIR 265cc Runner Bare

670hp, LS2, LS3 L98, LS3 CYLINDER HEADS. DRP - Detroit Racing Products.

New As cast, LS2 LS3 L98 Cylinder Heads - Pair of Bare Heads. 

*NO Exchange*

LS3 - L92 style Cylinder Heads + 15 deg valve angle. 

670HP! Bolt on power upgrade. Rectangle Port. 

These LS3 cylinder heads are bolt on horse power upgrades. No need to rebuild or CNC port your old cylinder heads, just fit these LS3 heads out with your existing valves and springs*, bolt on and go! Perfect upgrade LS cylinder heads, CNC multi angle valve seats and all factory mounting points. Everything will swap over. Oustanding quality castings, you wont be dissapointed. *We recommend refacing your existing valves. 

*We can supply complete assembled with Stainless steel valves and various valve springs options

Condition: Brand New

Guides: Steel Valve Guides (OEM type) -

Material:  Hard 356 Aluminium -  Race Quality.

Valve Seats:  3 Angle Valve Seats 

Intake Port Volume:    264cc

Exhaust port Volume 86cc

Chamber size:  66cc - 68cc depending on valve dish

Intake Valve size:  2.165"

Exhaust Valve size: 1.590"/1.600"

Valve Angle:                    15°  (Standard Angle) 

Min bore dia:                   4.000"

Intake port location: stock

Exhaust port location: stock

Quantity Sold:  Pair (2 bare cylinder heads)

Flow Figures: 4.000" Bore @28" (flow figures will increase on a larger bore)

Lift          Intake   Exhaust   

200      134       108

300      201       145

400      256       169

500      295       189

550      303       197

600      312       202      643 HP*

650      320       207      660 HP*

700      325       210      670 HP*

750      328       212

* HP ratings are a Potential what the cylinder head can produce based on calculations from air flow testing. Your actual results will depenend on the motor build and other components and build.