Engines and Components› Cylinder Heads and Components

Texas Speed & Performance

PRC LS3 6-Bolt 260cc CNC Cylinder Heads

$2,679.99

SKU: 199-PRCLS36B260

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Special Order
Ships in 4–6 weeks
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$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Texas Speed & Performance PRC LS3 Aftermarket 6-Bolt 260cc CNC Cylinder Heads are fully CNC-ported and machined using state-of-the-art technology. These heads feature new PRC 13-degree valve angle LS3 castings designed for improved piston-to-valve clearance, allowing for extra compression and larger camshafts. The intake port volume is smaller than stock for improved port velocity.
Show original supplier description
The Texas Speed & Performance PRC LS3 Aftermarket 6-Bolt 260cc CNC Cylinder Heads are precision race components fully CNC-ported and machined using state-of-the-art technology, made and cast in the USA. These heads are built upon new PRC 13-degree valve angle LS3 castings that provide improved piston-to-valve clearance, enabling the use of extra compression and larger camshafts. The intake port volume is smaller than stock for enhanced port velocity, resulting in a cylinder head that moves more air than stock GM LS3 heads while maintaining better port velocity. These 260cc runner heads are designed for LS3/L99/L92 stroker engines needing significant airflow, offering over 380 cfm at .700" lift. They come standard with 2.185" stainless steel hollow-stem intake valves and 1.60" stainless steel exhaust valves, billet rocker pedestals, and CHE bronze guides. The 13-degree valve angle further enhances performance potential. Available with chamber sizes ranging from 60cc to 68cc, these cylinder heads are also offered with options for different spring kits, including TSP's .660" and .750" dual spring kits featuring PAC valve springs with titanium retainers. They are also available with hollow stem intake and inconel exhaust valves. The 6-bolt configuration is standard to accommodate aftermarket engine blocks with 6-bolt capabilities, such as GMPP LSx, RHS, and ERL Super Deck, and they feature a .750” thick deck surface ideal for nitrous or boosted applications.
Vehicle Symptoms
  • Loss of power at high RPM
  • Engine misfires under load
  • Excessive oil consumption from valve seals
  • Check engine light with misfire codes
  • Overheating due to head gasket failure
Diagnostic Codes
  • P0300 – random misfire
  • P0301 – cylinder 1 misfire
  • P0302 – cylinder 2 misfire
  • P0303 – cylinder 3 misfire
  • P0304 – cylinder 4 misfire
  • P0305 – cylinder 5 misfire
  • P0306 – cylinder 6 misfire
Relevant Conversations
  • LS3 cylinder head upgrade for more power
  • P0300 random misfire after cam swap – new heads?
  • Texas Speed PRC vs GM LS3 heads comparison
  • 260cc CNC heads for 427 stroker build
  • Will PRC LS3 heads fit stock block?
  • Best cylinder heads for boosted LS3 engine
  • LS3 head gasket replacement with PRC heads
  • PRC LS3 heads install time and torque specs
  • Pairing PRC heads with BTR stage 3 cam
  • LS3 head porting vs buying PRC CNC heads

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.

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Specifications

BrandTexas Speed & Performance
Part Number199-PRCLS36B260
CategoryEngines and Components
5,000+ Trusted brands
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(760) 282-4645 hello@motormia.co

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