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Small Bore LS7 Pro Elite™ 266cc (For LS1/LS2)

Part Number: 54503

Availability: In stock

Code: 54503

Shipping Weight: 24.50

Quick Overview

6-Bolt or 4-Bolt Blocks

Pro Elite™ CNC-Ported 3.9" - 4.0" Bore LS7 Head (Bare)

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  • Pro Elite™ CNC-Ported 3.9" - 4.0" Bore LS7 Head (Bare)


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

RHS® Pro Elite™3.900" 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 won’t 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