Garage Sale

FED LS3 821/823/LSA Stage 1 Cylinder Heads (set) - Porting Service - Complete (Assembled)

! WARNING: Cancer and Reproductive Harm - www.p65Warnings.ca.gov

GM LS3 Porting Service

  • Reuse Factory Intake Valves: 2.165″
  • Reuse Factory Exhaust Valves: 1.590″
  • Intake Volume: 288cc
  • Exhaust Volume: 93cc
  • Intake Peak Flow: 390
  • Exhaust Peak Flow: 260
  • Seats: Stock Iron
  • Guides: Stock Powdered Metal
  • Minimum Bore: 4.000″
  • Intake Manifold Recommendation: FED Billet Low Pro
  • Stock Rockers or Jesel. Smith Brothers Trunnion Upgrade Kit Recommended
  • Springs: FED .660″ Dual LSX Spring Kit with Titanium Retainers

FED LS3 Porting Service

From a heads cam LS build to a moderate power adder street car.  Our Stage 1 GM square port porting services are EXACTLY what your ride needs to put the power to the ground.  Contact us now if you have any questions!

Tech Specs: GM LS3 – Stage 1

  • Reuse Factory Intake Valves: 2.165″
  • Reuse Factory Exhaust Valves: 1.590″
  • Intake Volume: 288cc
  • Exhaust Volume: 93cc
  • Intake Peak Flow: 390
  • Exhaust Peak Flow: 260
  • Seats: Stock Iron
  • Guides: Stock Powdered Metal
  • Minimum Bore: 4.000″
  • Intake Manifold Recommendation: FED Billet Low Pro
  • Stock Rockers or Jesel. Smith Brothers Trunnion Upgrade Kit Recommended
  • Springs: FED .660″ Dual LSX Spring Kit with Titanium Retainers

Also Includes:

  • Teardown/Clean/Inspect
  • 5-Axis CNC Porting – Intake/Exhaust/Chambers
  • Precision CNC Valve Job
  • Ends Machined
  • Hand Blending
  • Surfacing
  • Final wash and Assembly
  • Pressure Tested
  • Quality Control at Every Stage

Lead Times:

  • LEAD TIMES MAY VARY.  You can drop off your heads or ship them to us. This FORM may be printed and shipped or emailed to sales@frankensteined.net. Frankenstein Engine Dynamics will not accept, nor work on any cylinder heads or manifolds without this form.
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