GM LS1 LS2 CATHEDRAL PORT 570 HP PERFORMANCE CYLINDER HEADS - PAIR (2 Heads) Bare.

LS1 LS2 CATHEDRAL PORT - to suit the 5.7ltr and 6.0ltr

210cc Runner - High Performance Ports

These Cylinder heads are a Performance replacement to the GM Cylinder heads. All factory mounting points with the Performance upgraded port. Machined - ready for assembly. 

This sale is for a Pair of Bare Heads.  

Brand New Pair of genuine DETROIT RACING PRODUCTS Cylinder heads. 

Sold as a BARE pair. 

Upgraded Bronze Valve Guides 0.570" OD x 8mm stem

Valve Stem seal: 0.500" (the factory Hat type seals wont fit)

Hard 355-T6 Aluminium - Race Quality.

3 Angle Valve Seats - machined - ready for assembly

Deck thickness:  0.425"

Intake Valve size:  2.020"  Upgrade

Exhaust Valve size: 1.600"  Upgrade

Intake Port:  212cc

Exhaust Port:  84cc

Combustion Chamber:  66cc 

Flat Mill:  .006" per CC. Minium chamber size 58cc.

Spark Plugs: 14mm x .750" Tapered Seat.

Flow Figures: in CFM

Flow Figures: in CFM - Please be aware of bore size when comparing CFM numbers.  A larger bore will always inflate flow figures as a result of the intake valve being unshrouded. Even 020" increase in the bore will inflate flow figures by more than 10%-20%. We recommend checking a CFM flow rate that is flowed on the same size bore as you intend to use. 

Flowed @ 28" on a 4.000" Bore. 

Lift        Intake   Exhaust

200        138        96              

300        205       140

400        248       175 

500        272       194

550        275       199    

600        278       203    572 HP flow potential

650        265       205 

700        268       207

HP figures are "Potential" based on Flow/Velocity calculations* 

Exceptional Quality for a Wow factor of a price! 

We can supply assembled - please contact us for availability and options.