Speed Engineering products are usually in stock and ship fast.  If you want to double check please feel free to email info@juicedmotorsports.com

SPEED ENGINEERING - 26-1044 - $2699
LT4 CNC PORTED CYLINDER HEADS - PAIR

We are proud to announce our line of LT1 and LT4 CNC cylinder heads. They are available for purchase with the stock GM valves, or Manley Severe Duty Pro Flo Intake Valves and Extreme Duty Exhaust Valves. Cylinder heads come standard with .660” lift Manley Valve Springs, Seats, and Titanium retainers. We have already pushed these cylinder heads over 1000rwhp on our shop C7 Corvette ZO6 with great results. Combine them with a BTR camshaft, and you cant go wrong.

Features Include:
· Full CNC Intake and Exhaust Ports
· 6.2L+ Engines (Will not work on 5.3L Engines)
· Factory CC Combustion Chambers
· Manley .660” Spring Kit
· Manley 2.120" Severe Duty Pro Flo Intake Valves (Optional)
· Manley 1.590" Extreme Duty Exhaust Valves (Optional)

Spring Specifics:
· 1.295'' O.D.
· 0.676'' I.D.
· 379 lbs./in. Spring Rate
· 155 @ 1.810'' / 405 @ 1.150''
· 0.660'' Max Valve Lift
· Double Spring (No Damper)
· 7° Titanium Retainer
· Viton Valve Seals

Cylinder Head Flow Numbers:
· .200” Lift (Exhaust 115CFM/Intake 199CFM)
· .250” Lift (Exhaust 135CFM/Intake 231CFM)
· .300” Lift (Exhaust 154CFM/Intake 264CFM)
· .350” Lift (Exhaust 182CFM/Intake 296CFM)
· .400” Lift (Exhaust 195CFM/Intake 318CFM)
· .450” Lift (Exhaust 208CFM/Intake 331CFM)
· .500” Lift (Exhaust 219CFM/Intake 338CFM)
· .550” Lift (Exhaust 231CFM/Intake 346CFM)
· .600” Lift (Exhaust 233CFM/Intake 353CFM)
· .650” Lift (Exhaust 238CFM/Intake 365CFM)
· .700” Lift (Exhaust 243CFM/Intake 371CFM)
· .750” Lift (Exhaust 246CFM/Intake 375CFM)
· .800” Lift (Exhaust 248CFM/Intake 379CFM)

VALVES