RHS 54504 Big Port LS7 Pro Elite Cylinder Head, 69cc/2.250/1.615/307cc
Bare Cylinder Head Style, Aluminum, Natural, 60cc - 69cc Combustion Chamber Volume Range
- This item ships directly from the manufacturer. It may take an additional 10 business days for Racing Head Service to ship this item.
- Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
- This item ships via Ground Shipping only. Expedited and Air shipping options are not available.
Designed for BIG Horsepower, BIG Cubic Inch Hardcore Street or Race GM LS Engines
Big engines make big power, but often cylinder heads dont provide the necessary flow characteristics for large power plants. RHS Pro Elite Big Port LS7 Cylinder Heads solve this problem. They are the only raised runner aftermarket LS7 heads with the runner volume to support large cubic inch applications, yet are still able to utilize both production and aftermarket intake manifolds and valve trains. Intake ports are raised .220"" from the stock location for a straight line of sight to the cylinder. The heads feature a .750"" thick deck surface and reinforced rocker rails, which make them perfect for high horsepower and boosted applications. They work well with all existing LS7 parts but have bigger intake ports and valves than the standard RHS Pro Elite LS7 Cylinder Heads. They feature the popular 6-bolt design, making them compatible with the RHS LS Race Block, GM LSX block and OEM GM LS blocks. These aluminum, CNC-ported heads feature a 307cc intake runner, 98cc exhaust runner and 69cc chamber volume. The intake valve is 2.250"" x 5/16"", while the exhaust valve is 1.615"" x 8mm. RHS Pro Elite Big Port LS7 Cylinder Heads are designed for larger cubic inch, all-out race engines but are also ideal for 454-502c.i. LS street engines.
Includes (1) bare 355-T6 aluminum CNC cylinder head
CNC-machined intake & exhaust runners as well as combustion chambers
Intake ports raised .220"" from stock location for strait line of sight into the cylinders
.750"" thick deck & reinforced rocker rails make heads ideal for high HP & boosted applications
6 head-bolt design works with RHS LS Race Block & GM LSX Block as well as standard 4-bolt LS blocks
6 bolt heads offer superior clamping capacity over standard 4-bolt; Excellent for high boost applications
Bigger intake ports & valves over standard Pro Elite LS7 Cylinder Heads
Set-up for 2.250"" intake & 1.615"" exhaust valves
Utilizes OEM or aftermarket LS7 valve train
*Requires COMP Shaft Mount Rockers OR part #54520; OEM LS7 Rocker Adaptor (Requires )
More Like This
RHS 11011 Pro Action BBC 24 Deg. Bare Aluminum Cylinder Head
RHS 11012 Pro Action BBC 24 Deg. Bare Aluminum Cylinder Head
RHS 11034 Pro Elite BBC 24 Deg. CNC-Ported Bare Aluminum Cylinder Head
RHS 12041 Small Block Chevy Aluminum Cylinder Head, 23 Deg, 72cc/180cc
RHS 12042-01 Cylinder Head, Small Block Chevy, 180cc, Flat Tappet
RHS 12042 Small Block Chevy Aluminum Cylinder Head, 23 Deg, 72cc/180cc
RHS 12043-01 Small Block Chevy Cylinder Head Assem., 200cc/Flat Tappet
RHS 12043-02 Small Block Chevy Cylinder Head Assem., 200cc/Hyd. Roller
RHS 12044-01 Small Block Chevy Cylinder Head Assem., 200cc/Flat Tappet
RHS 12045 Small Block Chevy Aluminum Cylinder Head, 23 Deg, 72cc/220cc
Q & A
Tim talks about the new Edelbrock powder coated cylinder heads and provides a little history on Federal Mogul heads.
Tim shows off our aluminum cylinder heads for 348-409 Chevys.
In part 2, you will read about the Generation 4 small block series of V8s that share the same platform as the Generation 3 discussed in part 1.
Trying to decide which power plant to use in your latest project? Here's a quick guide of modern V8 engines for hot rodders to consider.
Illustration showing the various styles of engine heads you may encounter on the Small Block Chevy engine.
Engine Cylinder Numbers
Tim M. has tried to stay true to the vintage route, but sometimes, exceptions must be made. For example, the original oiling system's paper element and canister are functional, but an upgraded system will be more reliable.