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  Home > Cylinder Heads > ProMAXX Cylinder Heads > Chevrolet _ LS Series >

ProMAXX C/H_XXtreme_GM LS1/LS2_240cc_2.080/1.600_59cc_Rectangular Port_3.898 Small Bore_Bare Head
ProMAXX Cylinder Heads

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Ships from Supplier
Price $1,609.00


Product Code: PMX-3345

Description Technical Specs
 


The ProMAXX XXTREME LS 240 small bore head will take your LS1, LS2, or LS3 to levels that fully CNC ported OEM heads can’t achieve. Back to back dyno tests show well known fully CNC ported heads fall 70hp short of this 240cc as cast monster. On identical engines, there is no comparison. Our small rectangle is a beast! 5.7 LS1 with moderate cams made over 605hp on pump gas.

Features:
  • Pro designed ports & chambers
  • 240cc as-cast port designed and tested in the USA
  • Ultra-smooth 356-T6 Aluminum Casting
  • 5 angle valve job
  • 59cc or 63cc 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


Assembled heads feature:
  • Utilizes 2.080 intake valve and 1.600 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
Flow Chart
2.080 Intake _ 1.600 Exhaust
Lift .200 .300 .400 .500 .600 .700 .800
Intake 148 225 275 320 338 345 347
Exhaust108 154 203 216 225 227261
Flow Data: cfm @ 28 inches of Water


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Cylinder Heads > ProMAXX Cylinder Heads > Chevrolet _ LS Series