XXTREME 245 LS 1/LS2 Cathedral 4.00+ Large Bore
(SOLD IN PAIRS)
$1,682.00 – $3,035.00
The XXTREME LS 255 cathedral port head utilizes an 11-degree valve angle to push it to the front of all cathedral aftermarket cylinder heads. Size for size, no one can touch this bad boy. If you have a 4.00 inch plus bore size engine and need cathedral heads, look no further to push your power to the XXTREME.
Requires 4″ bore minimum and LS3 intake rocker.
Features:
- Pro designed ports & chambers
- 255cc as-cast port designed and tested in the USA
- Ultra-smooth 356-T6 Aluminum Casting
- 5 angle valve job
- 63CC or 59CC Chamber size or additional options available
- 11 Degree Valve Angle
- Diamond honed guides
- Built-in raised valve cover rail
- Monster .750 deck thickness
- Billet LS3 OEM Rocker Stand
- For use with standard or 6 bolt pattern
- Large spring pockets
- Utilizes 2.125 intake valve and 1.60 exhaust valve (Larger sizes available upon request)
- Multiple spring options
- Assemblies include: 21-4N stainless 1pc swirl polished back cut valves
- Machined and Assembled in the USA
- Outperforms other comparable heads in the industry
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