Engines and Components› Cylinder Heads and Components

Texas Speed

PRC Stage 2.5 LS6 Cylinder Heads

$1,399.99

SKU: 199-LS62.5

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Overview

The Texas Speed PRC Stage 2.5 LS6 cylinder heads are performance-engineered components utilizing seasoned GM 243 or 799 cores. Each head is fully CNC-ported and assembled with 2.02-inch intake and 1.575-inch exhaust stainless steel valves.

These cylinder heads feature chamber sizes ranging from 58cc to 64cc and are compatible with various spring kit upgrades.
Show original supplier description
The Texas Speed PRC Stage 2.5 LS6 cylinder heads are professional-grade, CNC-ported upgrades built from seasoned GM 243 or 799 castings. By applying advanced CNC machining to the intake and exhaust ports, these heads significantly enhance engine volumetric efficiency compared to stock specifications. Technically, these heads come equipped with 2.02-inch intake and 1.575-inch exhaust stainless steel valves. They are available with multiple chamber configurations between 58cc and 64cc, allowing for precise compression ratio tuning. The assembly is fully machined and milled to meet specific performance requirements. For high-lift cam profiles, an optional PAC .660-inch lift dual valve spring kit is available. This upgrade includes precision-machined titanium retainers, hardened spring seats, and new Viton valve seals to ensure valvetrain stability and extended service life under aggressive operating conditions. As these are performance-oriented internal engine components, professional installation is recommended to ensure correct geometry and compatibility with the existing valvetrain and rotating assembly.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandTexas Speed
Part Number199-LS62.5
CategoryEngines and Components
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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