Garage Sale

FED LS3 821/823/LSA Stage 2 Cylinder Heads (set) - Porting Service - Complete (Assembled)

$1,849.98

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

GM LS3 Porting Service

  • Manley Stainless Intake Valves: 2.180″
  • Manley Stainless Exhaust Valves: 1.600″
  • Intake Volume: 292cc
  • Exhaust Volume: 93cc
  • Chamber: 70cc
  • Seats: Stock Iron
  • Guides: Stock Powdered Metal
  • Minimum Bore: 4.060
  • 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
  • Intake Peak Flow: 394
  • Exhaust Peak Flow: 266
  • Recommended Alternative for Performance: FED F-310

FED LS3 Porting Service

Max effort 4.070″ bore or higher build and not quite ready to plunge into the aftermarket world?  We’ve got you covered.  With an upgraded Manley stainless 2.180″/1.600″ intake and exhaust valve combination, our Stage 2 ported GM square port LS3 porting services are what your ride needs to make MAX power without spending max money. Contact us now if you have any questions!

Tech Specs: GM LS3 – Stage 2

  • Manley Stainless Intake Valves: 2.180″
  • Manley Stainless Exhaust Valves: 1.600″
  • Intake Volume: 292cc
  • Exhaust Volume: 93cc
  • Chamber: 70cc
  • Seats: Stock Iron
  • Guides: Stock Powdered Metal
  • Minimum Bore: 4.060
  • 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
  • Intake Peak Flow: 394
  • Exhaust Peak Flow: 266
  • Recommended Alternative for Performance: FED F-310

Our Process 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:

  • All Pricing Assumes Cores Provided: 10-15 business days from the time your head gets to our facility. 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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