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$1,200.99
$1,166.99
RHS 54503 Small Bore LS7 Pro Elite 266cc Cylinder Head, For LS1/LS2
RHS 54503 Small Bore LS7 Pro Elite 266cc Cylinder Head, For LS1/LS2

RHS 54503 Small Bore LS7 Pro Elite 266cc Cylinder Head, For LS1/LS2

LS7 Chevy LS V8, Bare Cylinder Head Style, Aluminum, Natural, CNC-Machined Runners

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RHS 54503 Small Bore LS7 Pro Elite 266cc Cylinder Head, For LS1/LS2
RHS 54503 Small Bore LS7 Pro Elite 266cc Cylinder Head, For LS1/LS2
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We estimate this item will ship on or before December 31st.
Part # 59054503
Save $34
$1,166.99
$1,200.99
each
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Important Messages:

  • 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.

Details

Cylinder Head Style:
Bare
Material Type:
Aluminum
Finish:
Natural
Combustion Chamber Volume:
69cc
Intake Runner Volume:
266cc
Combustion Chamber Volume Range:
60cc - 69cc
Intake Runner Volume Range:
260cc - 269cc
CNC-Machined Runners:
Yes
CNC-Machined Combustion Chamber:
Yes
Intake Port Location:
Raised
Exhaust Port Shape:
D-port
Exhaust Port Location:
Raised
Intake Valve Diameter:
2.100"
Intake Valves Included:
No
Exhaust Valve Diameter:
1.575"
Exhaust Valves Included:
No
Valve Spring Included:
No
Damper Spring Included:
No
Machined for O-Ring:
No
Valve Seats Machined:
No
Valve Stem Seals Included:
No
Valve Guides Included:
No
Locks Included:
No
Retainers Included:
No
Guideplates Included:
No
Rocker Arms Included:
No
Rocker Arm Studs Included:
No
Rocker Arm Nuts Included:
No
Oiling Style:
Through Pushrod
Heat Crossover:
No
Steam Holes Drilled:
No
Accessory Bolt Holes Drilled:
No
Sold in Quantity:
Each
MFG. Part #:
54503
GTIN Code:
036584254775

Info


Finally, LS7 Heads for Small Bore GM LS Blocks (LS1-LS6-LS2) are Available

RHS Pro Elite3.900" Bore LS7 CNC-Ported Cylinder Heads not only get the best LS rectangular port heads onto all GM LS 5.7L 6.0L blocks, they also provide up to 100 bolt-on horsepower over stock and feature all the benefits of other RHS LS7 heads. These new Pro Elite cylinder fit all LS applications down to the 3.900" bore, and utilize LS7 intake manifolds. Offered in CNC and P-Port (unfinished runner) versions, the heads intake ports are raised .220" from the stock location for a straight line of sight into the cylinder, and utilize the LS 6-bolt head design compatible with the RHS LS Race Block and GM LSX Block. They can also be used with OEM, 4-bolt blocks. Additionally, a .750"- thick deck surface and reinforced rocker rails make for more rigidity in high horsepower and boosted applications. RHS Pro Elite 3.900" Bore LS7 CNC-Ported Cylinder Heads are designed to use eight standard, LS1-style exhaust rockers and eight offset LS3-style style intake rockers and stands. Buyers will save money, as they wont need to order a full set of less common 1.8 ratio LS7 rockers.

  • 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

  • FIt LS Blocks down to 3.900" bore - Perfect for 5.7-6.0L (LS1/LS6/LS2/LQ4/LQ9) block equipped applications

  • Uses (8) LS3 offset intake rockers & (8) LS1 intake or exhaust rockers OR (8) LS3 exhaust rockers over less common/more expensive LS7 rockers

  • Will work with standard 4-bolt OEM LS blocks or aftermarket 6-bolt blocks (RHS LS Alum. Block & GMPP LSX)

  • .750" thick deck & reinforced rocker rails make heads ideal for high HP & boosted applications

  • Set-up for 2.100" intake & 1.575" exhaust valves

Some parts are not legal for use in California or other states with similar laws/regulations

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