GM LS1 Stage 2 FED Heads



Lead Times:

  • Core Provided: 7-12 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 Frankenstein Engine Dynamics will not accept, nor work on any cylinder heads or manifolds without this form.
  • Core Not Provided: Same day shipping is determined by availability. If not in stock, lead time is typically 7-12 business days, though you will receive a call with a more accurate lead time on the next business day after purchase.
  • Core Exchange: You buy a “core not provided” head. As soon as we receive your heads in return, you will receive a refund on the difference. (If you Paid Cash – you will receive a check. If you Paid CC – we will process immediately and you will receive your refund within 3-5 business days due to processing.)
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Looking to spray more than a 200 shot or turn the boost up a bit more?  With an upgraded Manley stainless 2.040″/1.575″ intake and exhaust valve combination and larger port, this is what YOU need to make your max effort build max effort without spending max money.  Need pushrods, cam, intake, lifters, gaskets or anything else LS on the planet?  We’ve got them on the shelf ready to ship!  Contact us now if you have any questions!

**Note 853/241 flow numbers may vary slightly.

Tech Specs: GM LS1 Stage 2 FED Heads

  • Manley Stainless Intake Valves: 2.040″
  • Manley Stainless Exhaust Valves: 1.575″
  • Intake Volume: 227cc
  • Exhaust Volume: 84cc
  • Stock Chamber
  • Seats: Stock Iron
  • Guides: Stock Powdered Metal
  • Minimum Bore: 3.900
  • Intake Manifold Recommendation: Stock, MSD Atomic or Fast LSXR
  • Stock Rockers. Smith Brothers Trunnion Upgrade Kit Recommended
  • Springs: FED .660″ Dual LSX Spring Kit with Titanium Retainers
  • Intake Peak Flow: 310
  • Exhaust Peak Flow: 240

Also Includes:

  • Teardown
  • Wash
  • CNC Port
  • CNC Valve Job
  • FED Logo
  • Hand Blend
  • Surface 0.010″
  • Final wash and assembly
  • Pressure Test


Additional information


Customer Core Provided, Customer Core Not Provided


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