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These are the some of the best cathedral cylinder heads on the market!

Trickflow "As Cast" 220cc CLICK FOR PRICING

Trickflow CNC Ported 215cc CLICK FOR PRICING

Trickflow CNC Ported 225cc CLICK FOR PRICING

Trickflow CNC Ported 235cc CLICK FOR PRICING

Trickflow CNC Ported 245cc CLICK FOR PRICING


Increased Piston to Valve Clearance
- Allows you to run a larger camshaft with more PTV clearance than a stock head

Thick Deck (.600")
- Withstands higher cylinder pressures when using forced induction & nitrous

Extreme Dual Valve Springs
- Rated for .650" Lift
- 450# Open, 150# Closed

Stainless Intake & Exhaust Valves
- Withstands higher exhaust temperatures

6 Bolts Per Cylinder Option (Available on 235cc & 245cc)
- Adds 2 more bolts per cylinder, which will withstand extreme cylinder pressures

During the development stage, Trick Flow engineers determined that the valve angles needed to change from 15* to 13.5*. This change decreased valve shrouding, increased mid-lift airflow, and increased rocker arm-to-valve cover clearance. Testing also proved that relocating the spark plug position in the combustion chamber further enhanced combustion along with mid lift airflow and improved the integrity of the casting in the chamber area. Trick Flow also added additional material to the decks (.600") and to the rocker arm mounting pads to improve high rpm valve train stability.

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Flow Numbers






Roller Rocker Arms

Yella Terra Ultralite Shaft Mount Non-Adjustable Roller Rocker 1.7 Ratio (LS1/LS2)

The use of roller rocker arms is recommended with cylinder heads having bronze guides. Using roller rockers will reduce the wear on the guides thus reduce oil consumption down the road.

Stock rockers scrub the valve tip above .550" lift, the more you shim a stock rocker, the worse the scrub becomes. A stock rocker should work like a rocking chair to open the valve, which is not at all how a roller rocker works. A stock rocker will have a wide pattern, if you shim it up to reduce the width of the pattern, you will increase the scrub, and this scrub is the source of the friction that causes tip and guide wear. A roller rocker works just the opposite, as you shim it up it reduces the sweep pattern, since it rolls there is no scrub.








Pushrods

Comp Cams Chromemoly Pushrods
Available in .025" increments

Comp Cams Pushrod Length Checker

A .100” longer than stock pushrod is required with these heads.






Head Gaskets

Trickflow "As Cast" 220cc (3.9 Bore)
3.910 Recommended

GM LS1 5.7L Multi-Layer Steel Cylinder Head Gaskets

Cometic 3.910" Multi-Layer Steel Cylinder Head Gaskets (.040")

Cometic 3.910" Multi-Layer Steel Cylinder Head Gaskets (.051")

Trickflow "As Cast" 220cc (4.0 Bore)
4.060 Recommended

GM LS3 6.2L Multi-Layer Steel Cylinder Head Gaskets

Cometic 4.060" Multi-Layer Steel Cylinder Head Gaskets (.040")

Cometic 4.060" Multi-Layer Steel Cylinder Head Gaskets (.051")

Trickflow CNC Ported 215cc
3.910 Recommended

GM LS1 5.7L Multi-Layer Steel Cylinder Head Gaskets

Cometic 3.910" Multi-Layer Steel Cylinder Head Gaskets (.040")

Cometic 3.910" Multi-Layer Steel Cylinder Head Gaskets (.051")

Trickflow CNC Ported 225cc
4.060 Recommended

GM LS3 6.2L Multi-Layer Steel Cylinder Head Gaskets

Cometic 4.060" Multi-Layer Steel Cylinder Head Gaskets (.040")

Cometic 4.060" Multi-Layer Steel Cylinder Head Gaskets (.051")

Trickflow CNC Ported 235cc
4.150 Recommended

GM LS7 7.0L Multi-Layer Steel Cylinder Head Gaskets

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